Something I'm working on...
I can mute and un-mute the game music or all the game sound entirely with one keypress (Thanks Insommy!) or use the sliders to set the volume, bring up the Bank and Market Search windows, and even use that right slider to alter the size of the font in the chat bubbles, which currently doesn't have an in-game slider and ignores what you set it to in XML.
So, any other functions or settings you'd like to have quick access to?