As new session files are created, they will inherit a default set of
properties from the global session template. You can modify these default
session properties though the "Program Preferences"
option in the "Edit" menu. On the "Session"
tab, click the "Change Default Session Properties"
button. A session properties dialog will appear where you can set all
the desired options.
(Note: changes made to the global session template will only apply
to session files created after the changes. If will not alter any existing
session files.)