I suggest to use Ctrl+Enter (or Cmd+Enter for macOS) to submit forms. As time goes by, more and more web apps and software are using this standard that, I guess, came from the shortcut to send emails (you can test it on Gmail).
What is the use of Ctrl F7?
Ctrl + F7 = Choose the move command. Alt + F7 = Find the next misspelling or grammatical error.
What is Ctrl Shift K do?
'Ctrl' + 'shift' +'K is the shortdut used for the 'Quick Filter Bar'. Using those keys will put the flashing text cursor in the Quick Filter Bar search field.
What is Ctrl Alt F?
Ctrl + Alt + F. Switch to full screen view.
What is Ctrl plus W?
Ctrl + W. Closes the active tab. Closes the window if there's only one tab open. Ctrl + Tab.