SatView uses text for four purposes: the title, the map, overlays, and the color (label) bar. The user may set the fonts he wants SatView to use for each of these. A font is defined by three parameters:
To use the Fonts panel, first select the type of text (Title, Map, Overlays, or color (Label Bar) you want to change. Then, choose the Font Family.Times, Helvetica, and Courier are offered to you explicitly. These fonts are practically guaranteed to exist on every PostScript printer. Therefore, if you stick with them, you can make your PostScript output look very much like what appears on the screen. If you aren't sure what fonts are available on your particular printer, be safe and stick with these. However, if you select Other, you may enter any font family name in the text field that pops up. If the font you specify is not available to your X server, you will be told immediately. There is no way to check if it is available on your printer.
Perhaps you have observed that the fonts available to your X server and those available to your printer are two very different things. Just because SatView can display a font doesn't mean your printer has heard of it. Likewise, your printer may know about fonts that are not defined for your X server. If you want SatView's PostScript output to use font families other than those that SatView displays, you may register this preference by checking Use a different font next to the Postscript Output Font item. Then enter the name of the font family you want to use. This is very confusing and, unless you are consumed by a font obsession, you will never want to deal with something this convoluted. But the control is there if you ever need it.
Your favorite fonts may be set via the .xresources file so you don't have to reset them every time you restart SatView.