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AE.13 X Resources

Programs running under the X Window System organize their user options under a hierarchy of classes and resources. You can specify default values for these options in your X resources file, usually named `~/.Xdefaults'.

Each line in the file specifies a value for one option or for a collection of related options, for one program or for several programs (optionally even for all programs).

MS-Windows systems don't support `~/.Xdefaults' files, but Emacs compiled for Windows looks for X resources in the Windows Registry, under the keys `HKEY_CURRENT_USER\SOFTWARE\GNU\Emacs' and `HKEY_LOCAL_MACHINE\SOFTWARE\GNU\Emacs'.

Programs define named resources with particular meanings. They also define how to group resources into named classes. For instance, in Emacs, the `internalBorder' resource controls the width of the internal border, and the `borderWidth' resource controls the width of the external border. Both of these resources are part of the `BorderWidth' class. Case distinctions are significant in these names.

In `~/.Xdefaults', you can specify a value for a single resource on one line, like this:

emacs.borderWidth: 2

Or you can use a class name to specify the same value for all resources in that class. Here's an example:

emacs.BorderWidth: 2

If you specify a value for a class, it becomes the default for all resources in that class. You can specify values for individual resources as well; these override the class value, for those particular resources. Thus, this example specifies 2 as the default width for all borders, but overrides this value with 4 for the external border:

emacs.BorderWidth: 2
emacs.borderWidth: 4

The order in which the lines appear in the file does not matter. Also, command-line options always override the X resources file.

The string `emacs' in the examples above is also a resource name. It actually represents the name of the executable file that you invoke to run Emacs. If Emacs is installed under a different name, it looks for resources under that name instead of `emacs'.

`-name name'
Use name as the resource name (and the title) for the initial Emacs frame. This option does not affect subsequent frames, but Lisp programs can specify frame names when they create frames.

If you don't specify this option, the default is to use the Emacs executable's name as the resource name.

`-xrm resource-values'
Specify X resource values for this Emacs job (see below).

For consistency, `-name' also specifies the name to use for other resource values that do not belong to any particular frame.

The resources that name Emacs invocations also belong to a class; its name is `Emacs'. If you write `Emacs' instead of `emacs', the resource applies to all frames in all Emacs jobs, regardless of frame titles and regardless of the name of the executable file. Here is an example:

Emacs.BorderWidth: 2
Emacs.borderWidth: 4

You can specify a string of additional resource values for Emacs to use with the command line option `-xrm resources'. The text resources should have the same format that you would use inside a file of X resources. To include multiple resource specifications in resources, put a newline between them, just as you would in a file. You can also use `#include "filename"' to include a file full of resource specifications. Resource values specified with `-xrm' take precedence over all other resource specifications.

The following table lists the resource names that designate options for Emacs, each with the class that it belongs to:

background (class Background)
Background color name.

bitmapIcon (class BitmapIcon)
Use a bitmap icon (a picture of a gnu) if `on', let the window manager choose an icon if `off'.

borderColor (class BorderColor)
Color name for the external border.

borderWidth (class BorderWidth)
Width in pixels of the external border.

cursorColor (class Foreground)
Color name for text cursor (point).

font (class Font)
Font name for text (or fontset name, see section Q.10 Fontsets).

foreground (class Foreground)
Color name for text.

geometry (class Geometry)
Window size and position. Be careful not to specify this resource as `emacs*geometry', because that may affect individual menus as well as the Emacs frame itself.

If this resource specifies a position, that position applies only to the initial Emacs frame (or, in the case of a resource for a specific frame name, only that frame). However, the size, if specified here, applies to all frames.

iconName (class Title)
Name to display in the icon.

internalBorder (class BorderWidth)
Width in pixels of the internal border.

lineSpacing (class LineSpacing)
Additional space (leading) between lines, in pixels.

menuBar (class MenuBar)
Give frames menu bars if `on'; don't have menu bars if `off'.

toolBar (class ToolBar)
Number of lines to reserve for the tool bar. A zero value suppresses the tool bar. If the value is non-zero and auto-resize-tool-bars is non-nil, the tool bar's size will be changed automatically so that all tool bar items are visible.

minibuffer (class Minibuffer)
If `none', don't make a minibuffer in this frame. It will use a separate minibuffer frame instead.

paneFont (class Font)
Font name for menu pane titles, in non-toolkit versions of Emacs.

pointerColor (class Foreground)
Color of the mouse cursor.

reverseVideo (class ReverseVideo)
Switch foreground and background default colors if `on', use colors as specified if `off'.

screenGamma (class ScreenGamma)
Gamma correction for colors, equivalent to the frame parameter screen-gamma.

selectionFont (class Font)
Font name for pop-up menu items, in non-toolkit versions of Emacs. (For toolkit versions, see AE.14 Lucid Menu X Resources, also see AE.15 LessTif Menu X Resources.)

synchronous (class Synchronous)
Run Emacs in synchronous mode if `on'. Synchronous mode is useful for debugging X problems.

title (class Title)
Name to display in the title bar of the initial Emacs frame.

verticalScrollBars (class ScrollBars)
Give frames scroll bars if `on'; don't have scroll bars if `off'.

Here are resources for controlling the appearance of particular faces (see section J.1 Using Multiple Typefaces):

Font for face face.
Foreground color for face face.
Background color for face face.
Underline flag for face face. Use `on' or `true' for yes.
Font family for face face.
Relative proportional width of the font to use for face face. It should be one of ultra-condensed, extra-condensed, condensed, semi-condensed, normal, semi-expanded, expanded, extra-expanded, or ultra-expanded.
Height of the font to use for face face: either an integer specifying the height in units of 1/10pt, or a floating point number that specifies a scale factor to scale the underlying face's default font, or a function to be called with the default height which will return a new height.
A weight to use for the face face. It must be one of ultra-bold, extra-bold, bold, semi-bold, normal, semi-light, light, extra-light, ultra-light.
The slant to use for the font of face face. It must be one of italic, oblique, normal, reverse-italic, or reverse-oblique.
Whether the face face should be drawn with a line striking through the characters.
Whether the characters in the face face should be overlined.
Whether to draw a box around the characters in face face.
Whether to display the characters in face face in inverse video.
The name of a pixmap data file to use for the stipple pattern, or false to not use stipple for the face face.
The background pixmap for the face face. Should be a name of a pixmap file or false.
Whether to draw the characters in the face face as bold.
Whether to draw the characters in the face face as italic.

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