The :guilabel:`Mode` drop down has 4 settings :menuselection:`Disable Screen Saver` turns off the screensaver, :menuselection:`Blank Screen Only` just turns the screen itself off, :menuselection:`Only One Screen Saver` sets one screensaver, and :menuselection:`Random Screen Saver` selects a random screensaver. If you selected to blank the screen change the :guilabel:`Blank After` field. If you have a random screensaver set you can change with the number of minutes it says with :guilabel:`Cycle After` for when the screensaver will change to another one. The checkbox for :guilabel:`Lock Screen After` takes the number of minutes to lock the screen and the number of minutes is how many minutes it takes to lock the screen.
If you try to select a screensaver that is not installed it will not show on the right hand side of the window. To preview a screensaver as when it would be activated press the :guilabel:`Preview` button. To see more settings for each individual screensaver press the :guilabel:`Settings` button.
If you want to kill the daemon :menuselection:`File --> Kill Daemon`. To restart the screensaver daemon :menuselection:`File --> Restart Daemon`. To make the screen blank :menuselection:`File --> Blank Screen Now`. To restart xscreensaver :menuselection:`File --> Restart Daemon`.
To change to get even more settings on your screensaver use the :guilabel:`Advanced` tab. To have your screen fade to black when blanking check the :guilabel:`Fade to Black when Blanking` checkbox. To have your screen fade back in from screen blanking check the :guilabel:`Fade from Black When Unblanking`. To change how fast your screen fades change the :guilabel:`Fade Duration` field.