`gnuplot` provides the `x11` terminal type for use with X servers.  This
 terminal type is set automatically at startup if the `DISPLAY` environment
 variable is set, if the `TERM` environment variable is set to `xterm`, or
 if the `-display` command line option is used.

 Syntax:
    set terminal x11 [reset] <n> [[no]enhanced] [font <fontspec>]
                     [title "<string>"] [[no]persist] [[no]raise] [close]

 Multiple plot windows are supported: `set terminal x11 <n>` directs the
 output to plot window number n.  If n>0, the terminal number will be
 appended to the window title (unless a title has been supplied manually)
 and the icon will be labeled `gplt <n>`.  The active window may be
 distinguished by a change in cursor (from default to crosshair.)

 The x11 terminal support enhanced text mode (see `enhanced`), subject
 to the available fonts. In order for font size commands embedded in text
 to have any effect, the default x11 font must be scalable. Thus the first
 example below will work as expected, but the second will not.

    set term x11 enhanced font "arial,15" 
    set title '{\=20 Big} Medium {\=5 Small}' 

    set term x11 enhanced font "terminal-14" 
    set title '{\=20 Big} Medium {\=5 Small}' 

 Plot windows remain open even when the `gnuplot` driver is changed to a
 different device.  A plot window can be closed by pressing the letter q
 while that window has input focus, or by choosing `close` from a window
 manager menu.  All plot windows can be closed by specifying `reset`, which
 actually terminates the subprocess which maintains the windows (unless
 `-persist` was specified).  The `close` command can be used to close
 individual plot windows by number.  However, after a `reset`, those plot
 windows left due to persist cannot be closed with the command `close`.
 A `close` without a number closes the current active plot window.

 The gnuplot outboard driver, gnuplot_x11, is searched in a default place
 chosen when the program is compiled.  You can override that by defining
 the environment variable GNUPLOT_DRIVER_DIR to point to a different
 location.

 Plot windows will automatically be closed at the end of the session
 unless the `-persist` option was given.

 The options `persist` and `raise` are unset by default, which means that
 the defaults (persist == no and raise == yes) or the command line options
 -persist / -raise or the Xresources are taken.  If [no]persist or
 [no]raise are specified, they will override command line options and
 Xresources.  Setting one of these options takes place immediately, so
 the behaviour of an already running driver can be modified.

 The option `title "<title name>"` will supply the title name of the window
 for the current plot window or plot window <n> if a number is given.
 Where (or if) this title is shown depends on your X window manager.

 The size or aspect ratio of a plot may be changed by resizing the `gnuplot`
 window.

 Linewidths and pointsizes may be changed from within `gnuplot` with
 `set linestyle`.

 For terminal type `x11`, `gnuplot` accepts (when initialized) the standard
 X Toolkit options and resources such as geometry, font, and name from the
 command line arguments or a configuration file.  See the X(1) man page
 (or its equivalent) for a description of such options.

 A number of other `gnuplot` options are available for the `x11` terminal.
 These may be specified either as command-line options when `gnuplot` is
 invoked or as resources in the configuration file ".Xdefaults".  They are
 set upon initialization and cannot be altered during a `gnuplot` session.
 (except `persist` and `raise`)

Subtopics available for set terminal x11:
    color_resources   command-line-options                grayscale_resources
    line_resources    monochrome_options                  pm3d_resources
    x11_fonts