Is there an alternative to right-clicking when EarTrumpet pops up?

[Achilles-Heals]

This works already for the EarTrumpet pop-up:
arrow up = selection moves up
arrow down = selection moves down
arrow left = lowers volume of selected application
arrow right = increases volume of selected application
tab = selection moves down to the next audio output
shift+tab = selection moves up to the previous audio output
m = mutes selected application
. = also mutes the selected application
esc = escapes EarTrumpet

What I'm trying to figure out is there a key on the keyboard that mimics what right-clicking does when an application is selected?

p.s. I'm using a macro pad to use EarTrumpet, but it would be great if I didn't need to use my mouse's right-click to fully utilize EarTrumpet. I've already tried shift+fn+f10 which usually brings up the right-click contextual menu but that doesn't work.

[riverar]

Spacebar is the key you're looking for. 😄

[Achilles-Heals]

Thank you so much! I was pressing all the keys trying to figure it out, idk why I didn't think of spacebar. I'm gonna make a macro using that to switch sources with one press.