iA Writer spell checking

Hi! I use iA Writer on my two iPads. Both are running iPadOS 18.6 and I am using the latest version of iA Writer.

For the life of me, I can’t see how to spell check a document.

I can find the setting to turn spell checking on or off (it turned “on”).

I can see a misspelled word and it I touch/highlight it then I get a red dotted line under it to show it’s a misspelled word and iA offers me the correct spelling.

But I can’t see how I spell check a whole document.

Can this be done? And if so; how?

I found a website that offered keyboard shortcuts; it suggested that [cmd] + [:] begins spell checking but that doesn’t work.

Any help would be greatly appreciated.

Alternatively, a Shortcut that would spell check text copied to memory would be Okay.

Regards,
Peter