The Palm Tungsten calendar “agenda” view has a display option to show background image. Unfortunately, the “background image” is light blue. That’s the only option. I wanted a background image.
So, after poking around a little, I found T3AgendaBG that lets you change the image, and a website that lets you create backgrounds from your own images. So, now I have a background image of St Benedict’s, near Ferdinand, IN. The picture is somewhere in my pictures from my geocaching trip.
The trick is making the image pale enough that you can still read the text on top of it, but not so pale that it is invisible.