How to defining fonts for the manual?
Open or create the file ~/.Xresources in your home directory. And add entries in the form e.g. *Text*font: Courier 20 bold *Listbox*font: Helvetica 20 load the X resources with the xrdb program. xrdb ~/.Xresources Now when you start the manual or the periodic table as stand-alone programs the fonts will be taken from the X resources. You can place it in your login script or preferably on the autostart programs like the .xinitrc or .