18 

    19 * .Xdefaults

    20 

    21 The syntax of an Xdefaults file is as follows:

    22 

    23   name.Class.resource: value

    24 

    25   name

    26                 The name of the application, some program allow change it by

    27                 '-name' option.

    28   class

    29                 The classification used to group resources together. The names

    30                 of classes conventionally start with an upper-case letter.

    31   resource

    32                 The name of the resource whose value is to be changed.

    33                 Resources are typically lowercase with uppercase

    34                 concatenation.

    35   value

    36                 The actual value of the resource. This can be 1 of 3 types:

    37                  * Integer (whole numbers).

    38                  * Boolean (true/false, yes/no, on/off).

    39                  * String, for example word (white), color (#ffffff), font

    40                    (-*-fixed-bold-r-*-*-*-100-*-*-*-*-iso8859-1 ) or path

    41                    (/usr/bin/firefox).

    42   delimiters

    43                 A period (.) is used to signify each step down into the

    44                 hierarchy. A colon (:) is used to separate the resource

    45                 declaration from the actual value.

    46 

    47 Comment start with '!' char and goes up to end of line or C-like /* */.

    48 

    49 Use xprop utility to find classes and resources used by application.

    50 

    51 To reread your .Xresources file, and throw away your old resources:

    52 

    53   $ xrdb ~/.Xdefaults

    54 

    55 To reread your .Xresources file, and keep your old resources:

    56 

    57  $ xrdb -merge ~/.Xdefaults

    58 

    59 **  Wildcard matching.

    60 

    61 The asterisk can be used as a wildcard, making it easy to write a single rule

    62 that can be applied to many different applications or elements.