That the edit box (that pops up when you highlight text in Android) can be dragged around
to move it out of the way of the icons to add polls, etc, for example.
Had previously been adding blank lines to position the text lower down so the box popped up lower down, too. Wasn’t a problem with remembering basic markup stuff like adding pointy brackets, asterisks and underscores for quotes, bold, and italics, but icons are pretty key for the other stuff.
Or maybe I wasn’t slow to realise, and it’s one of those things that was added to Android not that long ago?