Shortcut · Data & editing
Google Sheets shortcut to fill right: copy the leftmost cell across the selection
⌘ on Mac is Ctrl on Windows. ⌥ on Mac is Alt on Windows.
Other data & editing shortcuts
Paste values only (strip formatting)⌘+⇧+VFill down: copy the top cell into the rest of the selection⌘+DInsert a row above the current selection⌘+⌥+=Insert a column to the left of the current selection⌘+⌥+=Delete the selected row⌘+⌥+-Delete the selected column⌘+⌥+-Undo the last change⌘+ZRedo the last undone change⌘+YFind in the current sheet⌘+FFind and replace across the workbook⌘+⇧+H