For example, combining "Reiszen's part1" and "Someone's part2" into one so it can be a one diff for a collab.
holy crap much thanks
Petal wrote:if the 2 maps are in the same mapset, then you can CTRL+C -> CTRL+O to open the difficulty selection -> go to the 2nd difficulty -> CTRL+V on the timestamp that the 2nd part starts. for greenlines you can do the same copy and paste method using the timing pannel.
if not then you can go through the .osu files and copy over stuff under [Timing] and [Hitobjects], probably want to save a copy before doing that though.