On a course page, in the weekly format each box representing a week has the "Show only week N" button which hides the other weeks from view.
For a teacher, it may be unclear whether this functionality hides the other weeks
- from just the teacher him/herself
- or from the entire course, i.e. is used to control what is "active" and visible on the course for everybody
A suggestion for a fix: change the tooltip string to "(only affects what you see)". This may be ambiguous though, better suggestions welcome.