Problem with Matrix - Graphics?

[malopopo]

Hello!

I have a problem with my Reason Lite, then with Matrix. I can't see the notes that I add. I've tried with and without instruments. I've tried all octaves, all presets, yes most of it, but I can't see the notes. What could be wrong? However, when I drag in Matrix, the notes appear.

I've uninstalled and reinstalled Reason, but to no avail.

See pics:

[bitley]

Matrix operates at one specific area. It is a very specific mini sequencer so it's very generally speaking better to edit sequences in the main sequencer area.