I need to use a tree component on a tablet layout. The default has VERY small text. While I can increase the font size with %(font:26)% it doesn't increase the image sizes to match.

Any advice?

Phil, there is no font size property for Tree component. I'll see if this should be added.

What you can do is increase the base font size for the entire screen. To do this, click on the empty space in the screen editor and then edit the Font property in the Properties View. Let me know if this works for you.