Chromebook change the Shelf position
By default, the Shelf sits at the bottom of the screen, but it doesn’t have to live there indefinitely. If you like your taskbar on the top or sides, Chrome OS offers that customization too.
Step 1: Right-click on the Shelf.
Step 2: Hover the cursor over the Shelf Position listed on the pop-up menu.
Step 3: Select Left, Bottom, or Right on the extended menu.