Keyboard shortcuts for Title and Subtitle?

I’ve recently discovered the keyboard shortcuts for entering headings - Ctrl+1, Ctrl+2 for Heading 1 and Heading 2, and so on. But are there no keyboard shortcuts for Title and Subtitle? I’ve been searching in the guide and online, and if they exist I’m not finding them; which I find a bit surprising.

You can define your own shortcuts in the Tools/ Customize/ Keyboard

Thanks for the reply, but I’ve given up on this. I’ve realised such a command is redundant as I just need to edit a couple of my templates.