diff --git a/ui-ngx/src/app/modules/home/components/alias/aliases-entity-select.component.ts b/ui-ngx/src/app/modules/home/components/alias/aliases-entity-select.component.ts
index ad7b3c6a11..c4f0dedc4a 100644
--- a/ui-ngx/src/app/modules/home/components/alias/aliases-entity-select.component.ts
+++ b/ui-ngx/src/app/modules/home/components/alias/aliases-entity-select.component.ts
@@ -15,6 +15,7 @@
 ///
 
 import {
+  ChangeDetectorRef,
   Component,
   Injector,
   Input,
@@ -73,6 +74,7 @@ export class AliasesEntitySelectComponent implements OnInit, OnDestroy {
 
   constructor(private translate: TranslateService,
               private overlay: Overlay,
+              private cd: ChangeDetectorRef,
               private breakpointObserver: BreakpointObserver,
               private viewContainerRef: ViewContainerRef) {
   }
@@ -179,6 +181,7 @@ export class AliasesEntitySelectComponent implements OnInit, OnDestroy {
       displayValue = this.translate.instant('entity.entities');
     }
     this.displayValue = displayValue;
+    this.cd.detectChanges();
   }
 
   private updateEntityAliasesInfo() {
diff --git a/ui-ngx/src/app/modules/home/components/dashboard-page/dashboard-image-dialog.component.html b/ui-ngx/src/app/modules/home/components/dashboard-page/dashboard-image-dialog.component.html
index f37e2991f3..12d044f36b 100644
--- a/ui-ngx/src/app/modules/home/components/dashboard-page/dashboard-image-dialog.component.html
+++ b/ui-ngx/src/app/modules/home/components/dashboard-page/dashboard-image-dialog.component.html
@@ -28,10 +28,32 @@
   <mat-progress-bar color="warn" mode="indeterminate" *ngIf="isLoading$ | async">
   </mat-progress-bar>
   <div mat-dialog-content style="position: relative;">
-    <fieldset [disabled]="(isLoading$ | async) || (takingScreenshot$ | async)" fxLayout="column" fxLayoutAlign="center center" fxLayoutGap="16px">
-      <div class="tb-image-preview-container">
-        <div *ngIf="!safeImageUrl; else elseBlock">{{ 'dashboard.no-image' | translate }}</div>
-        <ng-template #elseBlock><img class="tb-image-preview" [src]="safeImageUrl" /></ng-template>
+    <fieldset [disabled]="(isLoading$ | async) || (takingScreenshot$ | async)" fxLayout="column" fxLayoutAlign="center center" fxLayoutGap="8px">
+      <div [formGroup]="dashboardRectFormGroup" fxLayout="column" fxLayoutGap="8px" fxLayoutAlign="center center">
+        <mat-form-field class="rect-field">
+          <mat-label>Top %</mat-label>
+          <input matInput formControlName="top" type="number" step="1" min="0" max="100">
+        </mat-form-field>
+        <div fxLayout="row" fxLayoutGap="8px" fxLayoutAlign="center center">
+          <mat-form-field  class="rect-field">
+            <mat-label>Left %</mat-label>
+            <input matInput formControlName="left" type="number" step="1" min="0" max="100">
+          </mat-form-field>
+          <div class="tb-image-preview-container">
+            <div *ngIf="!safeImageUrl; else elseBlock">{{ 'dashboard.no-image' | translate }}</div>
+            <ng-template #elseBlock><img class="tb-image-preview" [src]="safeImageUrl" /></ng-template>
+          </div>
+          <mat-form-field class="rect-field">
+            <mat-label>Right %</mat-label>
+            <input matInput formControlName="right" type="number" step="1" min="0" max="100">
+          </mat-form-field>
+        </div>
+        <mat-form-field class="rect-field">
+          <mat-label>Bottom %</mat-label>
+          <input matInput formControlName="bottom" type="number" step="1" min="0" max="100">
+        </mat-form-field>
+      </div>
+      <div [formGroup]="dashboardRectFormGroup" fxFlex fxLayout="row" fxLayoutGap="8px">
       </div>
       <button mat-raised-button color="accent"
               type="button"
diff --git a/ui-ngx/src/app/modules/home/components/dashboard-page/dashboard-image-dialog.component.scss b/ui-ngx/src/app/modules/home/components/dashboard-page/dashboard-image-dialog.component.scss
index 7960026d56..85f20ad3c9 100644
--- a/ui-ngx/src/app/modules/home/components/dashboard-page/dashboard-image-dialog.component.scss
+++ b/ui-ngx/src/app/modules/home/components/dashboard-page/dashboard-image-dialog.component.scss
@@ -17,6 +17,11 @@
 $previewSize: 300px !default;
 
 :host {
+
+  mat-form-field.rect-field {
+    max-width: 60px;
+  }
+
   .tb-image-preview {
     width: auto;
     max-width: $previewSize - 2;
diff --git a/ui-ngx/src/app/modules/home/components/dashboard-page/dashboard-image-dialog.component.ts b/ui-ngx/src/app/modules/home/components/dashboard-page/dashboard-image-dialog.component.ts
index 3586f781d5..0bc0206740 100644
--- a/ui-ngx/src/app/modules/home/components/dashboard-page/dashboard-image-dialog.component.ts
+++ b/ui-ngx/src/app/modules/home/components/dashboard-page/dashboard-image-dialog.component.ts
@@ -18,7 +18,7 @@ import { Component, Inject } from '@angular/core';
 import { MAT_DIALOG_DATA, MatDialogRef } from '@angular/material/dialog';
 import { Store } from '@ngrx/store';
 import { AppState } from '@core/core.state';
-import { FormBuilder, FormGroup } from '@angular/forms';
+import { FormBuilder, FormGroup, Validators } from '@angular/forms';
 import { Router } from '@angular/router';
 import { DialogComponent } from '@app/shared/components/dialog.component';
 import { DashboardId } from '@shared/models/id/dashboard-id';
@@ -27,6 +27,7 @@ import { DomSanitizer, SafeUrl } from '@angular/platform-browser';
 import html2canvas from 'html2canvas';
 import { map, share } from 'rxjs/operators';
 import { BehaviorSubject, from } from 'rxjs';
+import { isNumber } from '@core/utils';
 
 export interface DashboardImageDialogData {
   dashboardId: DashboardId;
@@ -55,6 +56,7 @@ export class DashboardImageDialogComponent extends DialogComponent<DashboardImag
   safeImageUrl?: SafeUrl;
   dashboardElement: HTMLElement;
 
+  dashboardRectFormGroup: FormGroup;
   dashboardImageFormGroup: FormGroup;
 
   constructor(protected store: Store<AppState>,
@@ -69,6 +71,14 @@ export class DashboardImageDialogComponent extends DialogComponent<DashboardImag
     this.dashboardId = this.data.dashboardId;
     this.updateImage(this.data.currentImage);
     this.dashboardElement = this.data.dashboardElement;
+    const clientRect = this.dashboardElement.getBoundingClientRect();
+
+    this.dashboardRectFormGroup = this.fb.group({
+      left: [0, [Validators.min(0), Validators.max(100)]],
+      top: [0, [Validators.min(0), Validators.max(100)]],
+      right: [100, [Validators.min(0), Validators.max(100)]],
+      bottom: [100, [Validators.min(0), Validators.max(100)]]
+    });
 
     this.dashboardImageFormGroup = this.fb.group({
       dashboardImage: [this.data.currentImage]
@@ -81,13 +91,45 @@ export class DashboardImageDialogComponent extends DialogComponent<DashboardImag
     );
   }
 
+  private convertUserPercent(percent: any, defaultValue: number): number {
+    let result: number;
+    if (isNumber(percent)) {
+      result = Math.max(0, Math.min(100, percent)) / 100;
+    } else {
+      result = defaultValue;
+    }
+    return result;
+  }
+
   takeScreenShot() {
     this.takingScreenshotSubject.next(true);
+    const rect = this.dashboardElement.getBoundingClientRect();
+
+    const leftVal = this.convertUserPercent(this.dashboardRectFormGroup.get('left').value, 0);
+    const topVal = this.convertUserPercent(this.dashboardRectFormGroup.get('top').value, 0);
+    const rightVal = this.convertUserPercent(this.dashboardRectFormGroup.get('right').value, 100);
+    const bottomVal = this.convertUserPercent(this.dashboardRectFormGroup.get('bottom').value, 100);
+
+    const left = leftVal * rect.width;
+    const top = topVal * rect.height;
+    const right = rightVal * rect.width;
+    const bottom = bottomVal * rect.height;
+
+    const x = rect.left + left;
+    const y = rect.top + top;
+    let width = right - left;
+    let height = bottom - top;
+    width = Math.max(1, width);
+    height = Math.max(1, height);
     from(html2canvas(this.dashboardElement, {
       logging: false,
       useCORS: true,
       foreignObjectRendering: false,
-      scale: 512 / this.dashboardElement.clientWidth
+      scale: 512 / width,
+      x,
+      y,
+      width,
+      height
     })).pipe(
       map(canvas => canvas.toDataURL())).subscribe(
       (image) => {
diff --git a/ui-ngx/src/app/modules/home/components/dashboard-page/dashboard-page.component.html b/ui-ngx/src/app/modules/home/components/dashboard-page/dashboard-page.component.html
index 50fbbbec13..5c54fe23e0 100644
--- a/ui-ngx/src/app/modules/home/components/dashboard-page/dashboard-page.component.html
+++ b/ui-ngx/src/app/modules/home/components/dashboard-page/dashboard-page.component.html
@@ -81,7 +81,7 @@
                   (click)="isFullscreen = !isFullscreen">
             <mat-icon>{{ isFullscreen ? 'fullscreen_exit' : 'fullscreen' }}</mat-icon>
           </button>
-          <button [fxShow]="currentDashboardId && !isEdit && isTenantAdmin() && displayUpdateDashboardImage()" mat-icon-button
+          <button [fxShow]="currentDashboardId && !isEdit && !isMobileApp && isTenantAdmin() && displayUpdateDashboardImage()" mat-icon-button
                   matTooltip="{{'dashboard.update-image' | translate}}"
                   matTooltipPosition="below"
                   (click)="updateDashboardImage($event)">
@@ -226,8 +226,6 @@
       <mat-drawer class="tb-details-drawer"
                   [opened]="isEditingWidget || isAddingWidget"
                   (openedStart)="detailsDrawerOpenedStart()"
-                  (opened)="detailsDrawerOpened()"
-                  (closedStart)="detailsDrawerClosedStart()"
                   (closed)="detailsDrawerClosed()"
                   mode="over"
                   position="end">
diff --git a/ui-ngx/src/app/modules/home/components/dashboard-page/dashboard-page.component.ts b/ui-ngx/src/app/modules/home/components/dashboard-page/dashboard-page.component.ts
index 34f2ad5736..f006bc55bf 100644
--- a/ui-ngx/src/app/modules/home/components/dashboard-page/dashboard-page.component.ts
+++ b/ui-ngx/src/app/modules/home/components/dashboard-page/dashboard-page.component.ts
@@ -15,6 +15,7 @@
 ///
 
 import {
+  ChangeDetectionStrategy,
   ChangeDetectorRef,
   Component, ElementRef,
   Inject,
@@ -134,7 +135,7 @@ import {
   templateUrl: './dashboard-page.component.html',
   styleUrls: ['./dashboard-page.component.scss'],
   encapsulation: ViewEncapsulation.None,
-  // changeDetection: ChangeDetectionStrategy.OnPush
+  changeDetection: ChangeDetectionStrategy.OnPush
 })
 export class DashboardPageComponent extends PageComponent implements IDashboardController, OnInit, OnDestroy {
 
@@ -425,9 +426,9 @@ export class DashboardPageComponent extends PageComponent implements IDashboardC
   }
 
   public runChangeDetection() {
-    /*setTimeout(() => {
+    this.ngZone.run(() => {
       this.cd.detectChanges();
-    });*/
+    });
   }
 
   public openToolbar() {
@@ -731,6 +732,7 @@ export class DashboardPageComponent extends PageComponent implements IDashboardC
           const widget = importData.widget;
           const layoutId = importData.layoutId;
           this.layouts[layoutId].layoutCtx.widgets.addWidgetId(widget.id);
+          this.runChangeDetection();
         }
       }
     );
@@ -885,28 +887,17 @@ export class DashboardPageComponent extends PageComponent implements IDashboardC
     } else if (this.isAddingWidget) {
       this.isAddingWidgetClosed = false;
     }
-    setTimeout(() => {
-      this.cd.detach();
-    }, 0);
-  }
-
-  detailsDrawerOpened() {
-    this.cd.reattach();
-  }
-
-  detailsDrawerClosedStart() {
-    this.cd.detach();
   }
 
   detailsDrawerClosed() {
     this.isEditingWidgetClosed = true;
     this.isAddingWidgetClosed = true;
-    this.cd.reattach();
   }
 
   private addWidgetToLayout(widget: Widget, layoutId: DashboardLayoutId) {
     this.dashboardUtils.addWidgetToLayout(this.dashboard, this.dashboardCtx.state, layoutId, widget);
     this.layouts[layoutId].layoutCtx.widgets.addWidgetId(widget.id);
+    this.runChangeDetection();
   }
 
   private selectTargetLayout(): Observable<DashboardLayoutId> {
@@ -1060,6 +1051,7 @@ export class DashboardPageComponent extends PageComponent implements IDashboardC
             pos, this.entityAliasesUpdated.bind(this), this.filtersUpdated.bind(this)).subscribe(
       (widget) => {
         layoutCtx.widgets.addWidgetId(widget.id);
+        this.runChangeDetection();
       });
   }
 
@@ -1068,6 +1060,7 @@ export class DashboardPageComponent extends PageComponent implements IDashboardC
       pos).subscribe(
       (widget) => {
         layoutCtx.widgets.addWidgetId(widget.id);
+        this.runChangeDetection();
       });
   }
 
@@ -1086,6 +1079,7 @@ export class DashboardPageComponent extends PageComponent implements IDashboardC
       if (res) {
         if (layoutCtx.widgets.removeWidgetId(widget.id)) {
           this.dashboardUtils.removeWidgetFromLayout(this.dashboard, this.dashboardCtx.state, layoutCtx.id, widget.id);
+          this.runChangeDetection();
         }
       }
     });
diff --git a/ui-ngx/src/app/modules/home/components/dashboard/dashboard.component.ts b/ui-ngx/src/app/modules/home/components/dashboard/dashboard.component.ts
index 90a432edbc..c871587ba2 100644
--- a/ui-ngx/src/app/modules/home/components/dashboard/dashboard.component.ts
+++ b/ui-ngx/src/app/modules/home/components/dashboard/dashboard.component.ts
@@ -15,7 +15,7 @@
 ///
 
 import {
-  AfterViewInit,
+  AfterViewInit, ChangeDetectionStrategy, ChangeDetectorRef,
   Component,
   DoCheck,
   Input,
@@ -59,7 +59,8 @@ import { UtilsService } from '@core/services/utils.service';
 @Component({
   selector: 'tb-dashboard',
   templateUrl: './dashboard.component.html',
-  styleUrls: ['./dashboard.component.scss']
+  styleUrls: ['./dashboard.component.scss'],
+  changeDetection: ChangeDetectionStrategy.OnPush
 })
 export class DashboardComponent extends PageComponent implements IDashboardComponent, DoCheck, OnInit, OnDestroy, AfterViewInit, OnChanges {
 
@@ -178,6 +179,7 @@ export class DashboardComponent extends PageComponent implements IDashboardCompo
               private breakpointObserver: BreakpointObserver,
               private differs: IterableDiffers,
               private kvDiffers: KeyValueDiffers,
+              private cd: ChangeDetectorRef,
               private ngZone: NgZone) {
     super(store);
     this.authUser = getCurrentAuthUser(store);
@@ -249,6 +251,7 @@ export class DashboardComponent extends PageComponent implements IDashboardCompo
     let updateLayoutOpts = false;
     let updateEditingOpts = false;
     let updateWidgets = false;
+    let updateDashboardTimewindow = false;
     for (const propName of Object.keys(changes)) {
       const change = changes[propName];
       if (!change.firstChange && change.currentValue !== change.previousValue) {
@@ -261,13 +264,16 @@ export class DashboardComponent extends PageComponent implements IDashboardCompo
         } else if (['widgets', 'widgetLayouts'].includes(propName)) {
           updateWidgets = true;
         } else if (propName === 'dashboardTimewindow') {
-          this.dashboardTimewindowChangedSubject.next(this.dashboardTimewindow);
+          updateDashboardTimewindow = true;
         }
       }
     }
     if (updateWidgets) {
       this.updateWidgets();
+    } else if (updateDashboardTimewindow) {
+      this.dashboardTimewindowChangedSubject.next(this.dashboardTimewindow);
     }
+
     if (updateMobileOpts) {
       this.updateMobileOpts();
     }
@@ -528,6 +534,10 @@ export class DashboardComponent extends PageComponent implements IDashboardCompo
     this.updateWidgetLayouts();
   }
 
+  public detectChanges() {
+    this.cd.detectChanges();
+  }
+
   private detectRowSize(isMobile: boolean, autofillHeight: boolean, parentHeight?: number): number | null {
     let rowHeight = null;
     if (!autofillHeight) {
diff --git a/ui-ngx/src/app/modules/home/components/profile/device/lwm2m/lwm2m-device-profile-transport-configuration.component.html b/ui-ngx/src/app/modules/home/components/profile/device/lwm2m/lwm2m-device-profile-transport-configuration.component.html
index 5363d05d74..a29605a527 100644
--- a/ui-ngx/src/app/modules/home/components/profile/device/lwm2m/lwm2m-device-profile-transport-configuration.component.html
+++ b/ui-ngx/src/app/modules/home/components/profile/device/lwm2m/lwm2m-device-profile-transport-configuration.component.html
@@ -51,7 +51,7 @@
         </section>
       </ng-template>
     </mat-tab>
-    <mat-tab label="{{ 'device-profile.lwm2m.bootstrap-tab' | translate }}">
+    <mat-tab label="{{ 'device-profile.lwm2m.servers' | translate }}">
       <ng-template matTabContent>
         <section [formGroup]="lwm2mDeviceProfileFormGroup">
           <div class="mat-padding">
diff --git a/ui-ngx/src/app/modules/home/components/widget/widget.component.ts b/ui-ngx/src/app/modules/home/components/widget/widget.component.ts
index 3044f29bca..4caf5f3edd 100644
--- a/ui-ngx/src/app/modules/home/components/widget/widget.component.ts
+++ b/ui-ngx/src/app/modules/home/components/widget/widget.component.ts
@@ -468,10 +468,13 @@ export class WidgetComponent extends PageComponent implements OnInit, AfterViewI
     );
   }
 
-  private detectChanges() {
+  private detectChanges(detectDashboardChanges = false) {
     if (!this.destroyed) {
       try {
         this.cd.detectChanges();
+        if (detectDashboardChanges) {
+          this.widgetContext.dashboard.detectChanges();
+        }
       } catch (e) {
         // console.log(e);
       }
@@ -491,6 +494,7 @@ export class WidgetComponent extends PageComponent implements OnInit, AfterViewI
     }
     if (!this.widgetContext.inited && this.isReady()) {
       this.widgetContext.inited = true;
+      this.widgetContext.dashboard.detectChanges();
       if (this.cafs.init) {
         this.cafs.init();
         this.cafs.init = null;
@@ -878,7 +882,7 @@ export class WidgetComponent extends PageComponent implements OnInit, AfterViewI
       timeWindowUpdated: (subscription, timeWindowConfig) => {
         this.ngZone.run(() => {
           this.widget.config.timewindow = timeWindowConfig;
-          this.detectChanges();
+          this.detectChanges(true);
         });
       }
     };
diff --git a/ui-ngx/src/app/modules/home/models/dashboard-component.models.ts b/ui-ngx/src/app/modules/home/models/dashboard-component.models.ts
index b1ded98ba7..88d09ac855 100644
--- a/ui-ngx/src/app/modules/home/models/dashboard-component.models.ts
+++ b/ui-ngx/src/app/modules/home/models/dashboard-component.models.ts
@@ -79,6 +79,7 @@ export interface IDashboardComponent {
   pauseChangeNotifications();
   resumeChangeNotifications();
   notifyLayoutUpdated();
+  detectChanges();
 }
 
 declare type DashboardWidgetUpdateOperation = 'add' | 'remove' | 'update';
@@ -342,7 +343,7 @@ export class DashboardWidget implements GridsterItem, IDashboardWidget {
       widget.id = guid();
     }
     this.widgetId = widget.id;
-    this.updateWidgetParams();
+    this.updateWidgetParams(false);
   }
 
   gridsterItemComponent$(): Observable<GridsterItemComponentInterface> {
@@ -353,7 +354,7 @@ export class DashboardWidget implements GridsterItem, IDashboardWidget {
     }
   }
 
-  updateWidgetParams() {
+  updateWidgetParams(detectChanges = true) {
     this.color = this.widget.config.color || 'rgba(0, 0, 0, 0.87)';
     this.backgroundColor = this.widget.config.backgroundColor || '#fff';
     this.padding = this.widget.config.padding || '8px';
@@ -405,6 +406,9 @@ export class DashboardWidget implements GridsterItem, IDashboardWidget {
 
     this.customHeaderActions = this.widgetContext.customHeaderActions ? this.widgetContext.customHeaderActions : [];
     this.widgetActions = this.widgetContext.widgetActions ? this.widgetContext.widgetActions : [];
+    if (detectChanges) {
+      this.dashboard.detectChanges();
+    }
   }
 
   @enumerable(true)
diff --git a/ui-ngx/src/app/shared/components/time/timewindow.component.ts b/ui-ngx/src/app/shared/components/time/timewindow.component.ts
index 0169feaae7..77d10eadcc 100644
--- a/ui-ngx/src/app/shared/components/time/timewindow.component.ts
+++ b/ui-ngx/src/app/shared/components/time/timewindow.component.ts
@@ -15,6 +15,7 @@
 ///
 
 import {
+  ChangeDetectorRef,
   Component,
   forwardRef,
   Inject,
@@ -158,6 +159,7 @@ export class TimewindowComponent implements OnInit, OnDestroy, ControlValueAcces
               private millisecondsToTimeStringPipe: MillisecondsToTimeStringPipe,
               private datePipe: DatePipe,
               private overlay: Overlay,
+              private cd: ChangeDetectorRef,
               public viewContainerRef: ViewContainerRef,
               public breakpointObserver: BreakpointObserver,
               @Inject(DOCUMENT) private document: Document,
@@ -313,6 +315,7 @@ export class TimewindowComponent implements OnInit, OnDestroy, ControlValueAcces
     } else {
       this.innerValue.displayTimezoneAbbr = '';
     }
+    this.cd.detectChanges();
   }
 
   hideLabel() {
diff --git a/ui-ngx/src/assets/locale/locale.constant-en_US.json b/ui-ngx/src/assets/locale/locale.constant-en_US.json
index 1eb540a2e3..3da7b4f4bb 100644
--- a/ui-ngx/src/assets/locale/locale.constant-en_US.json
+++ b/ui-ngx/src/assets/locale/locale.constant-en_US.json
@@ -1234,7 +1234,6 @@
             "required": " value is required.",
             "mode": "Security config mode",
             "pattern_hex_dec": "{ count, plural, 0 {must be hex decimal format} other {must be # characters} }",
-            "bootstrap-tab": "Bootstrap",
             "servers": "Servers",
             "short-id": "Short ID",
             "short-id-tip": "Short Server ID",