Gmail comes with a huge list of keyboard shortcuts that can make using it quicker and cooler.
To enable these keyboard shortcuts :
1. Login to Gmail account and select “Settings” from the gear icon.
2. Under the “General” section, scroll down to “Keyboard shortcuts” and choose the option of “Keyboard shortcuts on”.
3. Save changes and exit.
Now, to quickly glance at the list of available Gmail shortcuts, press the “?” key, a whole bunch of keys and their associated functions will be neatly displayed within Gmail.