How do you edit display on webtiles (0.16)

[Lawndart Jedi]

I would like to know how to edit the display configuration on webtiles 0.16. I use http://crawl.akrasiac.org:8080/#lobby as my link to webtiles. I have edited the display on some old downloaded versions I had saved on my computer but can't figure out how to do it on webtiles.

The main thing I want to do is add more messages showing on the bottom left of the screen. Right now it has 6 and I want to increase to 8. I have plenty of screen space for it on my monitor. Right now I have 5 extra tiles in the vertical (3 on top, 2 on bottom) that are outside LOS.

Thanks