==Signature== 
 I like the "what's up doc" in your signature. How do you do that? Can you think of something neat for my signature?    
 :In your "my preferences" tab, you can create a customized signature. Scroll down to the "Signature" section. Check the box for "Treat the above as wiki markup". Then put whatever coding into the "Signature" box... being sure to abide by the coding rules, which are alluded to in WP:USER and are explained in detail in Wikipedia:Signatures#Customizing your signature. To see the coding I use for it (which is quite simple compared to some of the signatures used by wikipedia editors) just do an "edit" in this section and take a look at the syntax that shows up for my signature. That approach will work for anyone's signature. The four tildes are replaced by the custom signature. ← '''' →  

 ::Hmm. I'll have to think of what to do with my sig. Any ideas of a photo/drawing/logo that combines a moon that is barking or has a barking dog?    
 :::As I recall, illustrations within signatures are generally against the rules. One reason, or maybe the main reason, has to do with page-load times. ← '''' →  
 :::: Yep .. what Bugs said.  It's a strain on server resources to have to go grab and display a graphic file for each and every sig./view that it called.  Whereas the "format" of text in a signature is an on the spot type of thing.  Not quite as "technical" as some of our devs might put it, but I think it's close to what happens. —     
 :::::I expect that if one user did it, it wouldn't be much of a deal - but if everyone did it, it would be. So it's not allowed. There's also an upper bound on the number of characters allowed in the signature string. I forget just what. ← '''' →