Collectible Card Game Headquarters

Hi there,

I feel like this is probably posted somewhere but I just can't find it. I'm loving Forge so far, but I'm trying to find any kind of guide on the UI itself - hotkeys, customizing, and most importantly how to "undo" certain actions.

The specific example that frustrates me is if I'm selecting a target for an action (such as an enter-the-battlefield trigger) and I click on the wrong card (creature, etc), I can't find any way to change my selection before I confirm. Is that possible? I did find that Ctrl+Z can un-tap lands if you're not in the midst of casting a spell, and you can toggle on and off attackers, but in general I've had a hard time sorting out miss-clicks when targeting.

Thanks!

Just to TL;DR that question, is there a way to change the target of an ability when you mis-click? (Just did it again in a key game action)