Share your dots and walls please, this saves people having to ask. Best way to do this is to have a link in your signature.
To open the linked scrot fullscreen in your browser, scroll down to the Download icon on the right (next to Like and Share at scrot.moe), right-click it and hit T on your keyboard to open the screenshot in a new browser tab, then switch to that tab. Copy and paste the address here and Boom! Fullscreen goodness.
(thanks to hhh from the BunsenLabs forum for the tip!)
We recommend http://scrot.moe for image uploads (use the linked thumbnail embed code), or as an option drag and drop your image into the reply box. Thank you very much, Mr. Neilypops!