Accidentally deleted an icon on your floorplan? Have no worries, as you can easily undo the action.
Undo and redo buttons are available in the toolbar:

You can undo and redo up to 50 actions in uplan during the current session. If you refresh the page, undo and redo commands will be unavailable.
Undo /Redo options in uplan
To undo your previous actions, press Ctrl + Z (for Windows)/Cmd + Z (for Mac) until you reach the action you want to undo. If you prefer mouse navigation to keyboard shortcuts, click undo.

To redo an action you've undone, press Ctrl + Shift + Z (for Windows)/Cmd + Shift + Z (for Mac) or click redo.

Both the redo and undo buttons get activated only after at least one action on the floorplan. You can undo/redo only your actions, not your collaborators'.