Move a window to a different workspace
Using the mouse:
- Open the Activities overview. 
- Click and drag the window to the workspace partially displayed on the side of the screen. 
- If more than one workspace is already in use, you can also drop the window onto one of the non-adjacent workspaces in the workspace selector between the search field and the window list. This workspace now contains the window you have dropped, and a new empty workspace appears at the end of the workspace selector. 
Using the keyboard:
- Select the window that you want to move (for example, using the Super+Tab window switcher). 
- 
Press Super+Shift+Page Up to move the window to a workspace left of the current workspace on the workspace selector. Press Super+Shift+Page Down to move the window to a workspace right of the current workspace on the workspace selector.