Voting
Chairs can run a vote in one of two ways. Which one you experience depends on what the chair starts. CHASE doesn't change what's physically expected of you, it only shows the tally and result.
Show of hands
The traditional placard vote: the chair calls for votes in favor, against, and abstaining, and counts raised placards/hands in the room. CHASE shows the tally and result on the presentation screen as the chair records it. There's nothing to do on your own device for this vote type.
Roll call vote
The chair calls each delegation by name in turn, and you answer with your vote when called (verbally or with your placard, per your committee's procedure). As with show-of-hands, this happens in the room. CHASE records each delegation's vote as the chair enters it and shows the running results on the presentation screen.
Majorities
Whatever the vote type, results are measured against the majority thresholds shown on your dashboard (simple and two-thirds). See Committee Overview & Status for how those are calculated.