Change email contents display font size of Thunderbird

Thunderbird email contents display appears to act similarly to a web brower, so hitting Ctrl and the '-'/'+' signs shrinks/enlarges the font size.

Note: this is not explained anywhere, and the preferences all change a different setting, AFAIK

Redhat: vnc to remote server

NOTE: if the vncserver insists on starting on a port other than 5966, like 6099, wipe the ~/.vnc directory and start over again. If that doesn't help, change the second instance of 5966 below to 6066 in the port forwarding ssh command, e.g. '-L 5966:localhost:6066'.

1.  as remote root on myhost
1. yum install tigervnc
2. yum install tigervnc-server
3. yum install libXfont pixman
4. yum install fluxbox
5. yum install firefox
2. as a remote user, myuser, on myhost
1. vncserver :66 -localhost
1. set a password, call it mypassword
3. as local user
1. ssh -L 5966:localhost:5966 myuser@myhost
1. leave running and do next step in another local term
2. vncviewer -encodings 'copyrect tight zrle hextile' localhost:5966
1. authenticate with mypassword
4. as a remote user, myuser, on myhost
1. export DISPLAY=:66
2. xterm &
3. fluxbox &
4. firefox &