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GNU Info (elisp)Multiple DisplaysMultiple Displays ================= A single Emacs can talk to more than one X display. Initially, Emacs uses just one display--the one chosen with the `DISPLAY' environment variable or with the `--display' option (Note: Initial Options.). To connect to another display, use the command `make-frame-on-display' or specify the `display' frame parameter when you create the frame. Emacs treats each X server as a separate terminal, giving each one its own selected frame and its own minibuffer windows. However, only one of those frames is "_the_ selected frame" at any given moment, see Note: Input Focus. A few Lisp variables are "terminal-local"; that is, they have a separate binding for each terminal. The binding in effect at any time is the one for the terminal that the currently selected frame belongs to. These variables include `default-minibuffer-frame', `defining-kbd-macro', `last-kbd-macro', and `system-key-alist'. They are always terminal-local, and can never be buffer-local (Note: Buffer-Local Variables) or frame-local. A single X server can handle more than one screen. A display name `HOST:SERVER.SCREEN' has three parts; the last part specifies the screen number for a given server. When you use two screens belonging to one server, Emacs knows by the similarity in their names that they share a single keyboard, and it treats them as a single terminal. - Command: make-frame-on-display display &optional parameters This creates a new frame on display DISPLAY, taking the other frame parameters from PARAMETERS. Aside from the DISPLAY argument, it is like `make-frame' (Note: Creating Frames). - Function: x-display-list This returns a list that indicates which X displays Emacs has a connection to. The elements of the list are strings, and each one is a display name. - Function: x-open-connection display &optional xrm-string must-succeed This function opens a connection to the X display DISPLAY. It does not create a frame on that display, but it permits you to check that communication can be established with that display. The optional argument XRM-STRING, if not `nil', is a string of resource names and values, in the same format used in the `.Xresources' file. The values you specify override the resource values recorded in the X server itself; they apply to all Emacs frames created on this display. Here's an example of what this string might look like: "*BorderWidth: 3\n*InternalBorder: 2\n" Note: Resources. If MUST-SUCCEED is non-`nil', failure to open the connection terminates Emacs. Otherwise, it is an ordinary Lisp error. - Function: x-close-connection display This function closes the connection to display DISPLAY. Before you can do this, you must first delete all the frames that were open on that display (Note: Deleting Frames). automatically generated by info2www version 1.2.2.9 |