The posting template is the one where I look into it myself. It would be nice to have all markup/color/greamlins on empty space near the posting box oin the same high so you not need to scroll down while writing.
The problem to this Idea is the variable, userselectable, width of the posting box. If the box larger then default it will destroy the layout.
How sounds the idea to put a line with the UBB code funktion on top of the posting box ? This is most time used und so you can use it without scrolling.