the command @command{apropos -v REGEXP} uses the highlight style to
mark the documentation parts matching @var{regexp}.
+@item tui-border
+Control the styling of the TUI border. Note that, unlike other
+styling options, only the color of the border can be controlled via
+@code{set style}. This was done for compatibility reasons, as TUI
+controls to set the border's intensity predated the addition of
+general styling to @value{GDBN}. @xref{TUI Configuration}.
+
+@item tui-active-border
+Control the styling of the active TUI border; that is, the TUI window
+that has the focus.
+
@end table
@node Numbers
only a single space to separate the line numbers from the source.
@end table
+Note that the colors of the TUI borders can be controlled using the
+appropriate @code{set style} commands. @xref{Output Styling}.
+
@node Emacs
@chapter Using @value{GDBN} under @sc{gnu} Emacs