+.TP 4
+.B Lock Screen
+When this is checked, the screen will be locked when it activates.
+.TP 4
+.B Lock Screen After
+This controls the length of the ``grace period'' between when the
+screensaver activates, and when the screen becomes locked. For
+example, if this is 5 minutes, and \fIBlank After\fP is 10 minutes,
+then after 10 minutes, the screen would blank. If there was user
+activity at 12 minutes, no password would be required to un-blank the
+screen. But, if there was user activity at 15 minutes or later (that
+is, \fILock Screen After\fP minutes after activation) then a password
+would be required. The default is 0, meaning that if locking is
+enabled, then a password will be required as soon as the screen blanks.
+.TP 4
+.B Preview
+This button, below the small preview window, runs the demo in full-screen
+mode so that you can try it out. This is the same thing that happens when
+you double-click an element in the list. Click the mouse to dismiss the
+full-screen preview.
+.TP 4
+.B Settings
+This button will pop up a dialog where you can configure settings specific
+to the display mode selected in the list.
+.SH SETTINGS DIALOG
+When you click on the \fISettings\fP button on the \fIDisplay Modes\fP
+tab, a configuration dialog will pop up that lets you customize settings
+of the selected display mode. Each display mode has its own custom
+configuration controls on the left side.
+
+On the right side is a paragraph or two describing the display mode.
+Below that is a \fBDocumentation\fP button that will display the display
+mode's manual page, if it has one, in a new window (since each of the
+display modes is actually a separate program, they each have their
+own manual.)
+
+The \fBAdvanced\fP button reconfigures the dialog box so that you can
+edit the display mode's command line directly, instead of using the
+graphical controls.
+.SH ADVANCED TAB
+This tab lets you change various settings used by the xscreensaver daemon
+itself, as well as some global options shared by all of the display modes.
+
+.B Image Manipulation
+
+Some of the graphics hacks manipulate images. These settings control
+where those source images come from.
+(All of these options work by invoking the
+.BR xscreensaver\-getimage (1)
+program, which is what actually does the work.)
+.RS 4
+.TP 4
+.B Grab Desktop Images
+If this option is selected, then they are allowed to manipulate the
+desktop image, that is, a display mode might draw a picture of your
+desktop melting, or being distorted in some way. The
+security-paranoid might want to disable this option, because if it is
+set, it means that the windows on your desktop will occasionally be
+visible while your screen is locked. Others will not be able to
+\fIdo\fP anything, but they may be able to \fIsee\fP whatever you left
+on your screen.
+.TP 4
+.B Grab Video Frames
+If your system has a video capture card, selecting this option will allow
+the image-manipulating modes to capture a frame of video to operate on.
+.TP 4
+.B Choose Random Image
+If this option is set, then the image-manipulating modes will select a
+random image file to operate on, from the specified source. That
+source may be a local directory, which will be recursively searched
+for images. Or, it may be the URL of an RSS or Atom feed (e.g., a
+Flickr gallery), in which case a random image from that feed will be
+selected instead. The contents of the feed will be cached locally and
+refreshed periodically as needed.
+.PP
+If more than one of the above image-related options are selected, then
+one will be chosen at random. If none of them are selected, then an
+image of video colorbars will be used instead.
+.RE
+.PP
+.B Text Manipulation
+
+Some of the display modes display and manipulate text. The following
+options control how that text is generated. (These parameters control
+the behavior of the
+.BR xscreensaver\-text (1)
+program, which is what actually does the work.)
+.RS 4
+.TP 4
+.B Host Name and Time
+If this checkbox is selected, then the text used by the screen savers
+will be the local host name, OS version, date, time, and system load.
+.TP 4
+.B Text
+If this checkbox is selected, then the literal text typed in the
+field to its right will be used. If it contains % escape sequences,
+they will be expanded as per
+.BR strftime (2).
+.TP 4
+.B Text File
+If this checkbox is selected, then the contents of the corresponding
+file will be displayed.
+.TP 4
+.B Program
+If this checkbox is selected, then the given program will be run,
+repeatedly, and its output will be displayed.
+.TP 4
+.B URL
+If this checkbox is selected, then the given HTTP URL will be downloaded
+and displayed repeatedly. If the document contains HTML, RSS, or Atom,
+it will be converted to plain-text first.
+
+Note: this re-downloads the document every time the screen saver
+runs out of text, so it will probably be hitting that web server multiple
+times a minute. Be careful that the owner of that server doesn't
+consider that to be abusive.
+.RE
+.PP
+.B Power Management Settings
+
+These settings control whether, and when, your monitor powers down.
+.RS 4
+.TP 4
+.B Power Management Enabled
+Whether the monitor should be powered down after a period of inactivity.
+
+If this option is grayed out, it means your X server does not support
+the XDPMS extension, and so control over the monitor's power state is
+not available.
+
+If you're using a laptop, don't be surprised if this has no effect:
+many laptops have monitor power-saving behavior built in at a very low
+level that is invisible to Unix and X. On such systems, you can
+typically only adjust the power-saving delays by changing settings
+in the BIOS in some hardware-specific way.
+.TP 4
+.B Standby After
+If \fIPower Management Enabled\fP is selected, the monitor will go black
+after this much idle time. (Graphics demos will stop running, also.)
+.TP 4
+.B Suspend After
+If \fIPower Management Enabled\fP is selected, the monitor will go
+into power-saving mode after this much idle time. This duration should
+be greater than or equal to \fIStandby\fP.
+.TP 4
+.B Off After
+If \fIPower Management Enabled\fP is selected, the monitor will fully
+power down after this much idle time. This duration should be greater
+than or equal to \fISuspend\fP.
+.TP 4
+.B Quick Power-off in "Blank Only" Mode
+If the display mode is set to \fIBlank Screen Only\fP and this is
+checked, then the monitor will be powered off immediately upon
+blanking, regardless of the other power-management settings. In this
+way, the power management idle-timers can be completely disabled, but
+the screen will be powered off when black. (This might be preferable
+on laptops.)
+.RE
+.PP
+.B Fading and Colormaps
+
+These options control how the screen fades to or from black when
+a screen saver begins or ends.
+.RS 4
+.TP 4
+.B Fade To Black When Blanking
projects / xscreensaver / blobdiff