gmailkeyboard shortcuts
Does GMail's "New Compose" support hotkeys?
With the old compose I could label mails I am writing with easily with the hotkey l. See Label outgoing emails in Gmail when composing the mail
But with the "New Compose" I always have to use the mouse to label, because the hotkeys seem not to work anymore. Is there a better way to label?
It is now possible to label and/or "star" messages when you send them.
Official Gmail Blog: Star and label messages before you send them
When composing a new message, you can assign labels or star it by using the labels drop-down menu. As you’d expect, recipients of messages organized this way won’t see your labels or stars.
This is the new compose window:
Press the down arrow in the lower right, then choose "Label".
This is the old compose window:
After some googling this is the best answer I can give you
Click on "Options" then click on "Show original":
The view source of the new window and then save that to a file that you can then attach
Best Answer
GMail's "New Compose" doesn't support hotkeys since it has to allow for text entry.
There are however ways to use the keyboard to access the submenu as ashtu mentioned.
If you would like to label the message first before doing anything else, you can push shift tab to immediately jump to the drop down menu, then push space or arrow key up/down to expand the menu, then arrow up/down to label submenu, and then arrow right to expand to the label context menu.
If you were to label the message after writing the email, then it's a lot more cumbersome to navigate to that submenu using tabs.
In either case, it would likely be much more efficient to have a script to automate the tab presses.
In my opinion, a more efficient way to label would be to send the messages first, then navigate to the sent mail folder, and label the messages (in bulk) from there.