Gaps at edges of integrated Storyline slides in RISE
I'm developing my first course using RISE. Some of the more sophisticated concepts & interactions require integration of Storyline blocks. PROBLEM: my SL blocks come in with a distracting, prominent white "gutter" along the left and right sides of the slides, on a gray "field". (see below)
I've attached the SL360 slide from which this Storyline block is derived.
Can some wonderful helper please tell me what I need to do differently to eliminate these "gutter gaps"? Thanks!