The size of the print in the threads is rather small. Is there a way that can be increased??
The WoodBarter forum has been using XenForo for a while now, and one of the options they've taken advantage of is the ability to choose the style you'd like to use (I'm guessing it selects which CSS file to invoke for the user.)
On woodbarter.com the selection is made by clicking a link in the bottom left of the screen -- circled in this screen grab:
It opens a dialog that lets you select the style of display to use:
Maybe a second CSS could be created that uses larger typesizes, etc, to help the folks who are having trouble with the small type? I know there can be a lot of work developing a consistent user interface, and that means either Jeff or somebody Jeff hires/delegates to do the job would have to put in several hours effort.