Rather than reaching for your mouse to click on the toolbar, use these access keys. Windows and Linux use Ctrl + letter. Macintosh uses Command + letter.

LetterActionLetterAction
cCopyvPaste
aSelect allxCut
zUndoyRedo
bBoldiItalic
uUnderline1Heading 1
2Heading 23Heading 3
4Heading 45Heading 5
6Heading 69Address
kInsert/edit link  

The following shortcuts use different access keys: Alt + Shift + letter.

LetterActionLetterAction
nCheck SpellinglAlign Left
jJustify TextcAlign Center
dStrikethroughrAlign Right
u ListaInsert link
o1. ListsRemove link
qQuotemInsert Image
wDistraction Free Writing modetInsert More Tag
pInsert Page Break taghHelp
xAdd/remove code tag  

Editor width in Distraction Free Writing mode:

Alt +Ctrl +Wider Alt -Ctrl -Narrower
Alt 0Ctrl 0Default width