Sorry to raise this here - I did send it as a request for assistance.

辰 chén: heavenly body; morning, unlike all the other radicals, does not say 'Kangxi radical 161' in the definition and I haven't succeeded in adding it. Apparently a pencil should appear. Does that mean I could edit the definition for myself only? I would like the radical number to appear for others too.

Evan has fixed it, but the fix hasn't propagated through the cache yet.

To edit your definitions on the web interface while you're studying them, just click on the definitions in the prompt area and type your new definition, then check or uncheck the "shared as correction" checkbox.

If it's from the word popup and not the study screen, there will be a pencil. There's also a pencil on the iOS app.

Ah, OK, thanks - I don't use the web interface. I'll look out for the pencil.

In the iOS app, when you're studying, tap the definition in the top prompt area in order to expand the tapdown, and the edit definition and edit mnemonic pencils will appear. You can do it on reading and definition prompts, too, by tapping just above the line dividing the bottom prompt area with the top prompt area.

I've seen that now, thanks.
It just seems to be more logical when I create a list. It seems silly to create a list with an error in it and then wait to notice the error again on study.

You can do it while creating the list, too. Finish editing the list, save, and then click on the word with the definition you want to edit to get its word popup. You can then edit the definition from the word popup.

Thanks, that's what I want.