Cannot move or edit a single track

Hi all audacity lovers,
I am trying to edit (shift, delete or cut) a single track but each time I use either time shit tools or others,
they somehow apply my request to all tracks. Any ideas on what I am doing wrong?
Thanks,
Ciro

Have you inadvertently go sync-lock turned on?

Look at the bottom of the Tracks menu.

See this page in the Manual: https://manual.audacityteam.org/man/sync_locked_track_groups.html

WC