"to strikethrough text, highlight the text then CMD-T. Click the strikethrough option at the top" I don't have a mac in front of me to test, which is why it isn't an "answer" – RaystafarianFeb 10 at 15:59
@Raystafarian It works. Post it as an answer. But why it does not show in the bar? – onemachFeb 10 at 16:05
It's not an implemented shortcut yet :( – RaystafarianFeb 10 at 16:17
To prevent questions about justified alignment, which doesn't have a button either: It's in the menu, Format » Alignment » Justify – Daniel BeckFeb 10 at 16:55