manpage: Document the new 'b' keyboard shortcut.

diff --git a/doc/pulseview.1 b/doc/pulseview.1
index 71a03ea47bc2c18d206ca1c2ded2b2ab39022c1e..eb294e1084e3f130b9e98eaaf3f0e25c03fbc327 100644 (file)
--- a/doc/pulseview.1
+++ b/doc/pulseview.1
@@ -62,6 +62,10 @@ Enable / disable sticky scrolling.
 .B "c"
 Show / hide cursors.
 .TP
+.B "b"
+Toggle between coloured trace backgrounds and alternating light/dark
+gray trace backgrounds.
+.TP
 .B "SPACE"
 Start / stop an acquisition.
 .TP