Keyboard shortcuts in the 'Remote' view:

Key         Legacy Map      Extended Map
--------    ------------    ------------
Tab         Menu            Menu
Esc         Back            Back
Enter ↵     OK              OK
Up    ▲     Up              Up
Left  ◀     Left            Left
Right ▶     Right           Right
Down  ▼     Down            Down
F1          Red             Red
F2          Green           Green
F3          Yellow          Yellow
F4          Blue            Blue
F5          FastRew         Schedule
F6          FastFwd         Timers
F7          —               Recordings
F8          —               Channels
F9          Menu            Setup
F10         Mute            Commands
F11         Volume+         Volume+
F12         Volume−         Volume−
PgUp  ▢⬆    Channel+        Channel
PgDn  ▢⬇    Channel−        Channel

For X & softhddevice, remote.conf:
XKeySym.Up         Up
XKeySym.Down       Down
XKeySym.Right      Right
XKeySym.Left       Left
XKeySym.Menu       Tab
XKeySym.Menu       F9
XKeySym.Ok         Return
XKeySym.Back       Escape
XKeySym.Red        F1
XKeySym.Green      F2
XKeySym.Yellow     F3
XKeySym.Blue       F4
XKeySym.FastFwd    F5
XKeySym.FastRew    F6
XKeySym.Channel+   Prior
XKeySym.Channel-   Next
XKeySym.Volume+    F12
XKeySym.Volume-    F11
XKeySym.Mute       F10
