Montage audio copy paste

I’m new in WL, looking for a substitute of Soundblade. As I’m working with classical music source-destination editing was simply great . In WL I can do something similar but I find that copy paste multitrack time selection from one montage to another only has a mix option, if I’m doing only one stereo track copy-paste it overlaping with crossfade as expecting. Maybe I’m missing something? Would be very grateful for any help.