Capital U in the picture ID

Another dumb question from me, but I'm full of them. What does the capital U within the picture ID circle mean in an ANNOUNCEMENT?  My picture does not show up and (I think) students must req...

QUESTION REGARDING ANNOUNCEMENTS

What is the purpose of empty small box that you can check or leave blank once you've made an ANNOUNCEMENT?  It is located to the left of the circular photo ID of the instructor in the announceme...

BLACK DOT

What is the black dot which appears to the left of a discussion before or after you pin it?

QUESTION ABOUT COPYING FROM SANDBOX

I created a syllabus under MODULES in the sandbox and tried to publish it.  Is there a way I can copy the syllabus from MODULES and move it to one of my classes on Canvas?