Sometimes effects just doesn’t fill up whole comp, so they need
to be expanded by Grow Bounds
.
For inserting a keyframe use
ALT + SHIFT + property
.
property
pos, rot, scale, …
For transparent backgrounds in comps use:
When blurring, you don’t want to those edges that are blurred to making blue box with white blurred borders. Just check:
For keyframe scaling, drag the keyframes at the opposite side of CTI while holding down alt key.