diff --git a/src/asset_manager/index.js b/src/asset_manager/index.js
index b2ac562d8..c72d413ab 100644
--- a/src/asset_manager/index.js
+++ b/src/asset_manager/index.js
@@ -56,6 +56,7 @@ export const evUpdate = `${evPfx}update`;
 export const evAdd = `${evPfx}add`;
 export const evRemove = `${evPfx}remove`;
 export const evRemoveBefore = `${evRemove}:before`;
+export const evCustom = `${evRemove}:custom`;
 
 export default () => {
   let c = {};
@@ -79,7 +80,8 @@ export default () => {
       update: evUpdate,
       add: evAdd,
       remove: evRemove,
-      removeBefore: evRemoveBefore
+      removeBefore: evRemoveBefore,
+      custom: evCustom
     },
 
     init(config = {}) {
diff --git a/src/commands/view/OpenAssets.js b/src/commands/view/OpenAssets.js
index cf1400f40..16c24efcb 100644
--- a/src/commands/view/OpenAssets.js
+++ b/src/commands/view/OpenAssets.js
@@ -1,11 +1,23 @@
 export default {
+  open(content) {
+    const { editor, title } = this;
+    const { Modal } = editor;
+    Modal.open({ title, content }).onceClose(() => editor.stopCommand(this.id));
+  },
+
+  close() {
+    const { Modal } = this.editor;
+    Modal && Modal.close();
+  },
+
   run(editor, sender, opts = {}) {
+    this.editor = editor;
     const modal = editor.Modal;
     const am = editor.AssetManager;
     const config = am.getConfig();
-    const title = opts.modalTitle || editor.t('assetManager.modalTitle') || '';
     const types = opts.types;
     const accept = opts.accept;
+    this.title = opts.modalTitle || editor.t('assetManager.modalTitle') || '';
 
     am.setTarget(opts.target);
     am.onClick(opts.onClick);
@@ -33,14 +45,12 @@ export default {
       uploadEl && uploadEl.setAttribute('accept', accept);
     }
 
-    modal
-      .open({ title, content: this.rendered })
-      .onceClose(() => editor.stopCommand(this.id));
+    this.open(this.rendered);
     return this;
   },
 
   stop(editor) {
-    const { Modal } = editor;
-    Modal && Modal.close();
+    this.editor = editor;
+    this.close(this.rendered);
   }
 };