How do you put a flag on Google Minesweeper without a mouse?

How do you put a flag on Google Minesweeper without a mouse?
Microsoft Minesweeper allows for the use of a keyboard instead of a mouse for players who prefer this type of control option.How Can I Play Microsoft Minesweeper using my Keyboard?

Movement in the Game
Keyboard Control

Set Flag or Chord
Ctrl+Space/Ctrl+Enter/Shift+Space/Shift+Enter

Open/Close Menu
Esc/Windows Key+Z

How to Play
F1

New Game
F2

Microsoft Minesweeper allows for the use of a keyboard instead of a mouse for players who prefer this type of control option.

How Can I Play Microsoft Minesweeper using my Keyboard?

Movement in the Game Keyboard Control
Set Flag or Chord Ctrl+Space/Ctrl+Enter/Shift+Space/Shift+Enter
Open/Close Menu Esc/Windows Key+Z
How to Play F1
New Game F2