Yes, you can copy and edit a playlist on Spotify. Here's how:

To copy a playlist:

1. Open Spotify and go to the playlist you want to copy.
2. Click on the three dots (...) next to the green "Play" button.
3. Select "Add to Playlist".
4. Choose "New Playlist". This will create a new playlist with the same songs.

To edit a playlist:

1. Go to the playlist you want to edit.
2. To remove a song, hover over the song and click the three dots (...) that appear. Then select "Remove from this Playlist".
3. To add a song, click on the three dots (...) next to the song you want to add from your library, then select "Add to Playlist" and choose the playlist you want to add it to.
4. To rearrange songs, simply click and drag the song to the position you want it in the playlist.

Remember, you can only edit playlists that you've created or ones that have been shared with you with the permission to edit.