The "current" time affects which scope of the "default" (a.k.a. "Time of Day") collection is used for the first box under the horizontal line.
Pretend that it is: [ 09:30 ] [ 14:30 ] [ 23:30 ]
The chosen project affects which scope of the "project" collection is used for the second box under the horizontal line. If there is no logged-in user, or no project is chosen, then the second box is not shown.