Unable to move notes in editor to certain places

Hi all
I am having difficulty understanding editor and moving notes.
As an example: I have a F2 note already placed & I want to move to C2 but will not let me place it on C2. It will only allow c#2 or B1.
Please can somebody tell me what I am doing wrong please?

Many thanks
Barry

Hi,

You can filter some notes out in the Chords section. Make sure the track doesn’t follow the Chord track (Chords or Scales).

Many thanks Martin.

Not quite sure I know what that means. However I will search and find out.
Never stop learning with Cubase.

Martin is referring to these settings

Thank you Raino. Appreciate your help and info.

regards
Barry