Commit f1579f52 authored by Richard M. Stallman's avatar Richard M. Stallman
Browse files

(Overlay Properties): Clarify how priorities affect use of the properties.

parent 0e874d89
......@@ -987,12 +987,14 @@ of them:
@table @code
@item priority
@kindex priority @r{(overlay property)}
This property's value (which should be a nonnegative number) determines
the priority of the overlay. The priority matters when two or more
overlays cover the same character and both specify a face for display;
the one whose @code{priority} value is larger takes priority over the
other, and its face attributes override the face attributes of the lower
priority overlay.
This property's value (which should be a nonnegative integer number)
determines the priority of the overlay. The priority matters when two
or more overlays cover the same character and both specify the same
property; the one whose @code{priority} value is larger takes priority
over the other. For the @code{face} property, the higher priority
value does not completely replace the other; instead, its face
attributes override the face attributes of the lower priority
@code{face} property.
Currently, all overlays take priority over text properties. Please
avoid using negative priority values, as we have not yet decided just
......
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