diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2d6e3fb01217a..fae7bbad2ff0d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
 ## v1.27.0 - Unreleased
 
 - [plugin] moved `WebviewViewResolveContext` from `window` to `root` namespace [#11216](https://github.com/eclipse-theia/theia/pull/11216) - Contributed on behalf of STMicroelectronics
+- [plugin] Support `TextEditor#show()` and `TextEditor#hide()` [#11168](https://github.com/eclipse-theia/theia/pull/11168) - Contributed on behalf of STMicroelectronics
 
 <a name="breaking_changes_1.27.0">[Breaking Changes:](#breaking_changes_1.27.0)</a>
 
diff --git a/packages/editor/src/browser/editor-manager.ts b/packages/editor/src/browser/editor-manager.ts
index d8b00e01a5d54..09ce73385ccf7 100644
--- a/packages/editor/src/browser/editor-manager.ts
+++ b/packages/editor/src/browser/editor-manager.ts
@@ -187,6 +187,20 @@ export class EditorManager extends NavigatableWidgetOpenHandler<EditorWidget> {
 
     // This override only serves to inform external callers that they can use EditorOpenerOptions.
     override open(uri: URI, options?: EditorOpenerOptions): Promise<EditorWidget> {
+
+        /* check whether we have a split request without a counter */
+        if (options && options.counter === undefined && options.widgetOptions?.mode) {
+            switch (options.widgetOptions.mode) {
+                case 'split-right':
+                case 'split-bottom':
+                case 'split-top':
+                case 'split-left':
+                    const counter = this.createCounterForUri(uri);
+                    const splitOptions: EditorOpenerOptions = { counter, ...options };
+                    return super.open(uri, splitOptions);
+            }
+        }
+
         return super.open(uri, options);
     }
 
diff --git a/packages/plugin-ext/src/common/plugin-api-rpc.ts b/packages/plugin-ext/src/common/plugin-api-rpc.ts
index abff12eabe343..2b26a92b2b59e 100644
--- a/packages/plugin-ext/src/common/plugin-api-rpc.ts
+++ b/packages/plugin-ext/src/common/plugin-api-rpc.ts
@@ -1161,11 +1161,10 @@ export interface DecorationOptions {
 }
 
 export interface TextEditorsMain {
-    // $tryShowTextDocument(resource: UriComponents, options: TextDocumentShowOptions): Promise<string>;
+    $tryShowTextDocument(uri: UriComponents, options?: TextDocumentShowOptions): Promise<void>;
     $registerTextEditorDecorationType(key: string, options: DecorationRenderOptions): void;
     $removeTextEditorDecorationType(key: string): void;
-    // $tryShowEditor(id: string, position: EditorPosition): Promise<void>;
-    // $tryHideEditor(id: string): Promise<void>;
+    $tryHideEditor(id: string): Promise<void>;
     $trySetOptions(id: string, options: TextEditorConfigurationUpdate): Promise<void>;
     $trySetDecorations(id: string, key: string, ranges: DecorationOptions[]): Promise<void>;
     $trySetDecorationsFast(id: string, key: string, ranges: number[]): Promise<void>;
diff --git a/packages/plugin-ext/src/main/browser/editors-and-documents-main.ts b/packages/plugin-ext/src/main/browser/editors-and-documents-main.ts
index 6d342661f5362..d2807b5f82ad6 100644
--- a/packages/plugin-ext/src/main/browser/editors-and-documents-main.ts
+++ b/packages/plugin-ext/src/main/browser/editors-and-documents-main.ts
@@ -41,6 +41,7 @@ export class EditorsAndDocumentsMain implements Disposable {
     private readonly textEditors = new Map<string, TextEditorMain>();
 
     private readonly modelService: EditorModelService;
+    private readonly editorService: EditorManager;
 
     private readonly onTextEditorAddEmitter = new Emitter<TextEditorMain[]>();
     private readonly onTextEditorRemoveEmitter = new Emitter<string[]>();
@@ -59,10 +60,10 @@ export class EditorsAndDocumentsMain implements Disposable {
     constructor(rpc: RPCProtocol, container: interfaces.Container) {
         this.proxy = rpc.getProxy(MAIN_RPC_CONTEXT.EDITORS_AND_DOCUMENTS_EXT);
 
-        const editorService = container.get(EditorManager);
+        this.editorService = container.get(EditorManager);
         this.modelService = container.get(EditorModelService);
 
-        this.stateComputer = new EditorAndDocumentStateComputer(d => this.onDelta(d), editorService, this.modelService);
+        this.stateComputer = new EditorAndDocumentStateComputer(d => this.onDelta(d), this.editorService, this.modelService);
         this.toDispose.push(this.stateComputer);
         this.toDispose.push(this.onTextEditorAddEmitter);
         this.toDispose.push(this.onTextEditorRemoveEmitter);
@@ -168,6 +169,19 @@ export class EditorsAndDocumentsMain implements Disposable {
     saveAll(includeUntitled?: boolean): Promise<boolean> {
         return this.modelService.saveAll(includeUntitled);
     }
+
+    hideEditor(id: string): Promise<void> {
+        for (const editorWidget of this.editorService.all) {
+            const monacoEditor = MonacoEditor.get(editorWidget);
+            if (monacoEditor) {
+                if (id === new EditorSnapshot(monacoEditor).id) {
+                    editorWidget.close();
+                    break;
+                }
+            }
+        }
+        return Promise.resolve();
+    }
 }
 
 class EditorAndDocumentStateComputer implements Disposable {
diff --git a/packages/plugin-ext/src/main/browser/main-context.ts b/packages/plugin-ext/src/main/browser/main-context.ts
index 92cb03bc8ae23..4b9fa7d04d493 100644
--- a/packages/plugin-ext/src/main/browser/main-context.ts
+++ b/packages/plugin-ext/src/main/browser/main-context.ts
@@ -94,7 +94,7 @@ export function setUpPluginApi(rpc: RPCProtocol, container: interfaces.Container
 
     const bulkEditService = container.get(MonacoBulkEditService);
     const monacoEditorService = container.get(MonacoEditorService);
-    const editorsMain = new TextEditorsMainImpl(editorsAndDocuments, rpc, bulkEditService, monacoEditorService);
+    const editorsMain = new TextEditorsMainImpl(editorsAndDocuments, documentsMain, rpc, bulkEditService, monacoEditorService);
     rpc.set(PLUGIN_RPC_CONTEXT.TEXT_EDITORS_MAIN, editorsMain);
 
     // start listening only after all clients are subscribed to events
diff --git a/packages/plugin-ext/src/main/browser/text-editors-main.ts b/packages/plugin-ext/src/main/browser/text-editors-main.ts
index 18a9230b8235f..9756262787654 100644
--- a/packages/plugin-ext/src/main/browser/text-editors-main.ts
+++ b/packages/plugin-ext/src/main/browser/text-editors-main.ts
@@ -28,9 +28,10 @@ import {
     DecorationRenderOptions,
     ThemeDecorationInstanceRenderOptions,
     DecorationOptions,
-    WorkspaceEditDto
+    WorkspaceEditDto,
+    DocumentsMain,
 } from '../../common/plugin-api-rpc';
-import { Range } from '../../common/plugin-api-rpc-model';
+import { Range, TextDocumentShowOptions } from '../../common/plugin-api-rpc-model';
 import { EditorsAndDocumentsMain } from './editors-and-documents-main';
 import { RPCProtocol } from '../../common/rpc-protocol';
 import { Disposable, DisposableCollection } from '@theia/core/lib/common/disposable';
@@ -54,6 +55,7 @@ export class TextEditorsMainImpl implements TextEditorsMain, Disposable {
 
     constructor(
         private readonly editorsAndDocuments: EditorsAndDocumentsMain,
+        private readonly documents: DocumentsMain,
         rpc: RPCProtocol,
         private readonly bulkEditService: MonacoBulkEditService,
         private readonly monacoEditorService: MonacoEditorService,
@@ -87,6 +89,10 @@ export class TextEditorsMainImpl implements TextEditorsMain, Disposable {
         }
     }
 
+    $tryShowTextDocument(uri: UriComponents, options?: TextDocumentShowOptions): Promise<void> {
+        return this.documents.$tryShowDocument(uri, options);
+    }
+
     $trySetOptions(id: string, options: TextEditorConfigurationUpdate): Promise<void> {
         if (!this.editorsAndDocuments.getEditor(id)) {
             return Promise.reject(disposed(`TextEditor: ${id}`));
@@ -173,6 +179,10 @@ export class TextEditorsMainImpl implements TextEditorsMain, Disposable {
         this.monacoEditorService.removeDecorationType(key);
     }
 
+    $tryHideEditor(id: string): Promise<void> {
+        return this.editorsAndDocuments.hideEditor(id);
+    }
+
     $trySetDecorations(id: string, key: string, ranges: DecorationOptions[]): Promise<void> {
         if (!this.editorsAndDocuments.getEditor(id)) {
             return Promise.reject(disposed(`TextEditor(${id})`));
diff --git a/packages/plugin-ext/src/plugin/text-editor.ts b/packages/plugin-ext/src/plugin/text-editor.ts
index a27ff47bf7267..ac5af354e56fa 100644
--- a/packages/plugin-ext/src/plugin/text-editor.ts
+++ b/packages/plugin-ext/src/plugin/text-editor.ts
@@ -236,11 +236,11 @@ export class TextEditorExt implements theia.TextEditor {
 
         // prepare data for serialization
         const edits: SingleEditOperation[] = editData.edits.map(e =>
-            ({
-                range: Converter.fromRange(e.range)!,
-                text: e.text,
-                forceMoveMarkers: e.forceMoveMarkers
-            }));
+        ({
+            range: Converter.fromRange(e.range)!,
+            text: e.text,
+            forceMoveMarkers: e.forceMoveMarkers
+        }));
 
         return this.proxy.$tryApplyEdits(this.id, editData.documentVersionId, edits, {
             setEndOfLine: editData.setEndOfLine,
@@ -263,6 +263,17 @@ export class TextEditorExt implements theia.TextEditor {
             return undefined;
         });
     }
+
+    show(column?: theia.ViewColumn): void {
+        this.proxy.$tryShowTextDocument(this.document.uri, {
+            viewColumn: column,
+            preview: true,
+        });
+    }
+
+    hide(): void {
+        this.proxy.$tryHideEditor(this.id);
+    }
 }
 
 export class TextEditorOptionsExt implements theia.TextEditorOptions {
diff --git a/packages/plugin/src/theia.d.ts b/packages/plugin/src/theia.d.ts
index e6387aced88c4..0fedbf64739b3 100644
--- a/packages/plugin/src/theia.d.ts
+++ b/packages/plugin/src/theia.d.ts
@@ -1215,6 +1215,22 @@ export module '@theia/plugin' {
          * @param revealType The scrolling strategy for revealing `range`.
          */
         revealRange(range: Range, revealType?: TextEditorRevealType): void;
+
+        /**
+         * Shows this text editor. A [column](#ViewColumn) can be provided to control where the editor is being shown. Might change the [active editor](#window.activeTextEditor).
+         *
+         * @deprecated use [window.showTextDocument](#Window.showTextDocument) instead.
+         *
+         * @param column A [view column](#ViewColumn) in which this editor should be shown.
+         */
+        show(column?: ViewColumn): void;
+
+        /**
+         * Hides this text editor.
+         *
+         * @deprecated use 'workbench.action.closeActiveEditor' command instead.
+         */
+        hide(): void;
     }
 
     /**