Selecting chords in Dorico 4.1

OK, maybe this is documented somewhere, or maybe I’m just using the wrong search terms, but after scouring the manuals and forum without success, and at the risk of being an annoying newbie, I’ve got what seems to be a very simple question.
While editing a score in Write mode with the keyboard, if you’ve selected a single note in a chord, how do you select the entire chord without having to take your hands off the keyboard and use the mouse? I’m constantly going back and forth between keys and mouse while editing a complex, harmonically dense piece for pianos. I must be doing something wrong.
I know there must be a way because at one point I once accidentally did select an entire chord when my hand slipped on the kbd. No idea what those mistyped keys were and I’ve never been able to reconstruct them.
Thanks for any help.

Cmd/Ctrl-Shift-A (Select More) should work, and in some circumstances Tab will work too.

Thanks! That works for me.