Shortcuts on a Laptop without numerci keypad

I have a quite old Laptop (Lenovo Thinkpad) without a numeric keypad, which I use almost only with Scrivener when working not at my desk.
I have no idea how to use some of the keyboard shortcuts without the numeric keypad, especially I would like to use the Speech mode (start and stop speech). I tried to change them, but the changes I tried do not work.
Can you help?
Thank you