Keyboard Shortcuts: Google Sheets
Technically, Alt I pulls down the Insert dropdrown menu. You’ll notice certain letters underlined in the words describing the options. Row above, for example, shows the R underlined. So the key sequence is Alt+I, then type the letter. You don’t need to hold down Alt+I after you see the menu. This will be the same for the following shortcuts.
Alt+I, B – After Alt+I with your cursor in any cell, type B to insert a row below.
Alt+I, C – Type C to insert a column to the left.
Alt+I, O – Insert a column to the right by typing an O.