In compatible browsers, an edit toolbar is automatically displayed with the edit box, provided that this has been set in the preferences. The functions are partly a typing aid, partly a reminder of required formats.
Example of how to use it:
In Mozilla and IE you get a select+click formatting, and if you click without a selection, it inserts sample text at the cursor. In other browsers, clicking on the button presents an explanation for each feature in an infobox.
If you do not want to display the toolbar, you can obtain some of the functionality of them using the Edit toolbar bookmarklets instead.
All of the toolbar options, and further editing options, are available in Bananeweizen's Firefox extension.
List of functions
(apart from the last two, these pieces of wikitext are obtained after selecting "abc")
'''abc''' ''abc'' [[abc]] [abc] == abc == [[Image:abc]] [[Media:abc]] <math>abc</math> <nowiki>abc</nowiki> --~~~~ ----