Hi, I'm newer with Reaper, so please forgive me the silly question: My problem with my recording is that when I move one track, I also move several other tracks together, so I cannot edit as I would like. I don't know why, but it happens with this file only. I recorded other file and I could edit (move independent tracks) with no problem. I just select the track cliking on it until it's highlighted, click on it again without releasing it and then drag, but other tracks (not all other tracks) move together. Is something about a setting? a Bug with my file? This is driving me nuts, so please, any help will be great and very welcome. Thanks

Check to see if 'Ripple editing' is on. If so, turn it off.

You can also lock individual items or all items in the project to prevent movement. Right-click on the lock icon in the toolbar for project lock settings (left-click to enable). Press F2 or click on the lock/unlock icon on the item (if enabled in preferences) for individual item locking.