Notebook font settings?

edit

I don't know of any easy way. An inconvenient way: edit the file SAGE_ROOT/devel/sagenb/sagenb/data/sage/css/main.css. For example, changing the line

body { background-color: white; }

to

body { background-color: white; font-family: impact, chicago; }

affects some of the fonts. Alternatively, notice that this file main.css says at the beginning

/* Warning: These .css files are automatically generated and will be overwritten */
/* when they are next generated. Please edit the SASS source located at */
/* <sagenb-spkg-root>/sass/src. Kindly refer to the readme for editing */
/* instructions at <sagenb-spkg-root>/sass */

So you could follow these directions and instead read SAGE_ROOT/devel/sagenb/sass/readme.txt and edit files in the directory SAGE_ROOT/devel/sagenb/sass/src/, and then compile the changes using compass.