diff --git a/Documentation/user-manual.txt b/Documentation/user-manual.txt
index 98633799a..27b09bf8b 100644
--- a/Documentation/user-manual.txt
+++ b/Documentation/user-manual.txt
@@ -372,6 +372,15 @@ of the dive computer (at least for those not charging while connected via USB).
    specific dive
    computer and, in some cases, how to do the correct settings to the operating
    system of the computer on which _Subsurface_ is running.
+   Some dive computers disable this drop-down as they use other means to find and
+   connect to the device. For some dive computers the data entered here is actually
+   the mount point of the USB storage device as which the dive computer identifies
+   itself.
+
+ - Below the three drop downs are up to four shortcut buttons that allow you to
+   easily switch between multiple dive computers that you are frequently downloading
+   from. These buttons only appear once you have downloaded from different dive
+   computers.
 
  - If all the dives on the dive computer need to be downloaded, check the
    checkbox _Force download of all dives_. Normally, _Subsurface_ only downloads