Icons at Thread Titles on PF Forum - Learn What They Mean!

[Stephanus]

Dear PF forum.
What are those icons at the thread title? B, I, A, etc. They are new, right?
Can someone give me the link to know that icons?

Thanks.

 

[Bandersnatch]

See the first thread in the forum feedback and announcements section.

 

[Greg Bernhardt]

https://www.physicsforums.com/threads/new-thread-level-prefixes-b-i-a.824360/

 

[Stephanus]

See the first thread in the forum feedback and announcements section.

https://www.physicsforums.com/threads/new-thread-level-prefixes-b-i-a.824360/

Thank you, thank you. I already now. Intermedia, beginners, advanced. And the OP set it or the staff can correct it if necessary.