How to disable 'Return to submit'?

I kinda bugs me that I have to hit Shift-Return to add a new line… I’m always forgetting and submitting half written instructions…

Like… I’m typing now… I don’t submit the second I hit return…

I’ve gotten into the habit of Shift-Return in all my applications… It kinda bugs me!

Any setting to turn this off?

E.g. Shift-Return to submit?

Many thanks,

KC20