I did not mean inside of the osu!editor, I have a friend who collaborated my map and he changed the offset in the song selection, while I don't know how he did that. Is it modifiable in the .osu file?
Endaris wrote:
Does it show on his end like this?
If yes that's not modifiable in the .osu file.
He set a local offset when playing the map.
This can be changed by starting up the map and using the +- keys - if necessary in combination with the Alt key - to get the offset back to 0.