Can't delete volume points

Listening to drum track in a piece, I wanted to reduce its volume by deleting some of the points in its track. the track has an R for reading what was done. If I uncheck the R, then it will just shot a flat line, all volume with no points. i don’t want that, so I want to delete points. It won’t let me delete any. I go on one and press delete and nothing happens. Actually the points don’t even highlight like they aren’t chosen. I can add new points or move, but not delete. (When I copy, the screen, the points don’t show, but the volume changes are seen.)

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Actually after posting and going to the track, one was highlighted and I deleted several in succession subsequently that were then highlighted, and then I was unable to select any again, so I don’t know what is going on. When I move one, it doesn’t highlight.

Hi,

Isn’t the Automation track Locked by any chance?