Write about the UI highlighting, finishing the audio section.

diff --git a/audio.rst b/audio.rst
index 94b31b63e689e388e96938ce51d9afd36626207f..4cf71e45133700549e1473a88f547a620b9e86c4 100644 (file)
--- a/audio.rst
+++ b/audio.rst
@@ -446,4 +446,12 @@ Some more expensive controllers support *motorized faders*, where
 the host can simply tell the control to move to the right place
 and thus solve the problem, but Nageru does not currently support them.
 
-(TODO: write about highlighting)
+.. image:: images/highlight.png
+
+To help you know which bank is active (or even that you have a MIDI
+controller connected at all), the currently mapped controller have
+a green **activity highlight**. When you switch banks, the highlight
+also updates—a controller is only highlighted if its mapping is
+active in the currently selected bank. This way, it is easy to see
+which controllers are currently controllable by MIDI, and which ones
+that are not.

diff --git a/images/highlight.png b/images/highlight.png
new file mode 100644 (file)
index 0000000..0929394
Binary files /dev/null and b/images/highlight.png differ