sure! I actually just made an extension (Cleaner Columns - as of this posting it's not yet approved) as a fix for the issue in this thread. Basically what I did was create a new extension that adds a CSS file that tunes some stuff. The extension is pretty simple:

Manifest.xml includes this line (and all the normal stuff):
<ClientScriptInitializer SourceFile="Initializer.js" MinProductVersionInclusive="6.0" />

Initializer.js includes only this line:
SC.util.includeStyleSheet(extensionContext.baseUrl + 'Style.css');

And, unsurprisingly, Style.css has my custom CSS in it.

To increase the font-size for the chat you'll want to add a rule such as:
.Messages .EntryHistoryPanel .HistoryPanel .ListPanel .Data { font-size: 16px; }

It defaults to 13px, so fiddle with it a little until you're happy. Good luck!

Edited by user Friday, June 9, 2017 7:31:19 AM(UTC)  | Reason: tuned the suggested CSS to only apply to the Messages block, and not Notes

@jweever - I'm afraid Cleaner Columns doesn't work with ScreenConnect/Connectwise Control 6.4+. I've been meaning to fix it, but haven't had the time and won't have the time until late January, at the earliest.

Basically what it does is alter the screen width that triggers whether the properties pane switches from side to below, effectively disabling the 'below' behavior. If I can get it updated soon I will let you know.