The Pixelmator Pro workspace is freely customizable — you can change the arrangement of different interface elements such as the Layers sidebar, Tool Options pane, and the Tools sidebar to find a layout that best suits your editing style.
Do one of the following:
In the layout customization window, drag any of the highlighted elements to start rearranging the workspace. If you simply click and hold an element, special indicators will appear suggesting where you can move it.
For instance, the Tools sidebar will snap to any edge of the application window, while the Tool Options pane and the Layers sidebar can be placed on the left or the right side of the screen.
To revert any changes made to the original layout, click Revert at the bottom of the layout customization window.