next face gets a chance. However, the @code{default} face must
specify all attributes.
- Any attribute can have the value @code{:ignore-defface}. The effect
-of this is identical to @code{unspecified}. It exists because of an
-technical ambiguity in giving attributes the value @code{unspecified}.
-@xref{Attribute Functions}.
-
Some of these font attributes are meaningful only on certain kinds of
displays---if your display cannot handle a certain attribute, the
attribute is ignored. (The attributes @code{:family}, @code{:width},
for frame @var{frame}. If @var{frame} is @code{nil}, it sets
the attribute for all frames, and the defaults for new frames.
-Unless you know what you're doing, don't set an attribute to
-@code{unspecified}. This is ambiguous---it is unclear whether it
-means to unspecify the value stored in the frame-local copies of the
-face (which means reverting to the original face spec), or the value
-in the face spec itself. What you probably want is to set the
-attribute to @code{:ignore-defface}. This forces the attribute value
-to be acquired from some other face during face merging.
-
The extra arguments @var{arguments} specify the attributes to set, and
the values for them. They should consist of alternating attribute names
(such as @code{:family} or @code{:underline}) and corresponding values.