The Symbols In This Forum

I’m quite new here and it would propably make finding and sorting information easier, if I knew better what the different symbols in the front of topics stand for.
I mean all the different colored images of letters (and then there’s the pinned ones and the ones with a small dot in the middle… etc.)?
Is there an explanation about the symbols anywhere for me to check out? :blink:

Check the bottom of the page. ;)