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'''xterm''' is the standard [[Wikipedia:Terminal emulator|terminal emulator]] for the [[X Window System]]. It is highly configurable and has many useful and some unusual features.
The ultimate authorities for using and customizing xterm are the ''man pages'' for ''xterm, uxterm, koi8rxterm, ''and ''resize; ''the [http://invisible-island.net/xterm/xterm.faq.html XTerm FAQ] and the [http://invisible-island.net/xterm/xterm.log.html XTerm ChangeLog].
Xterm is used with different hardware on a variety of operating systems, not just with a PC keyboard on a GNU/Linux system.  There are several options you can set in your X resources files that may make this terminal emulator much easier to use.
*Allow xterm to report the '''TERM '''variable correctly.  '''Do not '''set the TERM variable from your ''~/.bashrc'' or ''~/.bash_profile'' or similar file.  The terminal itself should report the correct TERM to the system so that the proper ''terminfo'' file will be used.  Two usable terminfo files are ''xterm, ''and ''xterm-256color.''
:– Without setting TERM explicitly, xterm should report {{ic|$TERM}} as {{ic|xterm}}.  You can check this with either of these commands:
{{bc|$ echo $TERM
$ tset -q}}
:– When TERM is not set explicitly, color schemes for some programs, such as ''vim, ''may not appear until a key is pressed or some other input occurs.  This can be remedied by setting the resource {{ic|termName}}, either from the command line with {{ic|xterm -tn xterm-256color}}, or by setting the resource value:
xterm*termName: xterm-256color
*Use '''UTF-8. '''First make certain your locale settings are correct for UTF-8, then add this to your resource file so that xterm interprets all incoming data as UTF-8 encoded:
XTerm*locale: true
*Fix the '''Alt '''key. {{Keypress|Alt}} is not the {{Keypress|Meta}} key, yet on PC keyboards {{Keypress|Alt}} is used as the {{Keypress|Meta}} key.  Make xterm aware of this by adding the following to your resource file:
XTerm*vt100.metaSendsEscape: true
As new lines are written to the bottom of the xterm window, older lines disappear from the top.  Xterm saves these lines and they can be redisplayed by scrolling.  By default, 1024 lines are saved.  You can change the number of saved lines with the {{ic|saveLines}} resource,
Xterm*saveLines: 4096
Normally, as new lines are produced, old lines would be scrolled off the top one by one.  This could cause some delay when a command produces a lot of output.  The resource {{ic|jumpScroll}} is set to {{ic|true}} by default so that multiple lines at a time are scrolled.
Two other resources that affect scrolling speed are {{ic|multiScroll}}, which allows asynchronous scrolling when set to {{ic|true}}, and {{ic|fastScroll}}, which suppresses refreshing the display when there is a large amount of output.  Both of these are set to {{ic|false}} by default.
For manual scrolling, one can use the mouse wheel, or the key combinations of {{Keypress|Shift+PageUp}} and {{Keypress|Shift+PageDown}} to scroll a half page at a time, or one can use the scrollbar.
====The Scrollbar====
The scrollbar is not shown by default. It can be made visible by a menu selection, by command line options, or by setting resource values.  It can be made to appear to the left or right of the window and its visual appearance can be modified through resource settings.
The scrollbar operates differently from what we are accustomed to using.
*To scroll down:
:– Click on the scrollbar with the left mouse button.
:– Click on the scrollbar below the ''thumb'' with the middle mouse button.
*To scroll up:
:– Click on the scrollbar with the right mouse button.
:– Click on the scrollbar above the ''thumb'' with the middle mouse button.
*To position text, moving in either direction:
:– Grab the ''thumb'' by using a "click-and-drag" with the middle mouse button.
The Archlinux version of xterm is compiled with the ''toolbar, ''or ''menubar, ''disabled.  The menus are still available as ''popups'' when you press {{Keypress|Ctrl+MouseButton}} within the xterm window.
Menu items are all togglesWhen the menu appears, drag the mouse to the desired item

Latest revision as of 05:31, 11 March 2013