Fix #53237

src/vs/workbench/parts/search/browser/searchWidget.ts

@@ -319,6 +319,7 @@ export class SearchWidget extends Widget {
 		this.replaceAllAction.label = SearchWidget.REPLACE_ALL_DISABLED_LABEL;
 		this.replaceActionBar = this._register(new ActionBar(this.replaceContainer));
 		this.replaceActionBar.push([this.replaceAllAction], { icon: true, label: false });
+		this.onkeydown(this.replaceActionBar.domNode, (keyboardEvent) => this.onReplaceActionbarKeyDown(keyboardEvent));
 
 		this.replaceInputFocusTracker = this._register(dom.trackFocus(this.replaceInput.inputElement));
 		this._register(this.replaceInputFocusTracker.onDidFocus(() => this.replaceInputBoxFocused.set(true)));
@@ -442,6 +443,13 @@ export class SearchWidget extends Widget {
 		}
 	}
 
+	private onReplaceActionbarKeyDown(keyboardEvent: IKeyboardEvent) {
+		if (keyboardEvent.equals(KeyMod.Shift | KeyCode.Tab)) {
+			this.focusRegexAction();
+			keyboardEvent.preventDefault();
+		}
+	}
+
 	private submitSearch(refresh: boolean = true): void {
 		const value = this.searchInput.getValue();
 		const useGlobalFindBuffer = this.configurationService.getValue<ISearchConfigurationProperties>('search').globalFindClipboard;