(For Most Preferences)
In the Preferences sub-menu - click on the desired Preference.
Choose Edit, Preferences, and the desired Preference (using the up/down arrow keys or the designated letter for that Preference) (ALT, E, P, Designated Letter).
When a Preference is enabled, a check mark is displayed on the Edit Preferences submenu immediately preceding it. Activating Procedures for each Preference are further discussed with each Preference description.