Excel's Undo button allows reverting to previous states before changes. Default undo limit is 16 actions, but Excel can handle up to 100. Ctrl+Z (Windows) or Command+Z (Mac) works as keyboard shortcuts. Undo feature works after saving changes but not when all workbooks are closed
Undo can be accessed through Edit menu or CTRL+Z shortcut. Redo function available via Shift+CTRL+Z shortcut. Undo History shows all actions from last 32 steps
Premium subscription can be cancelled through profile settings on all devices. Process works across Android, iPhone, and desktop platforms. Cancellation requires selecting "Manage membership" and "Deactivate"
Ctrl-Z undoes last action, Shift-Ctrl-Z redoes it. F9 allows adjusting parameters after last operation. Adjust Last Operation shows parameter changes in bottom left panel