Google Sheets – Keyboard Shortcut to Extend Formula Down

Without installing a Chrome extension, you can use these three key combinations to go to the next sheet on Chrome OS.

1. Alt+Shift+K (Display list of sheets)

2. up/down key (Highlight sheet)

3. Enter (Go to sheet)

Source.

There isn't one.

If the cell is blank, just start typing.

If the cell has content, press F2 and you'll be able to edit. (Microsoft Excel is the same.)

I'm afraid if you want to get into the formula bar you'll need to use the mouse.