All you need to do is move any patterns that are in the way to where they need to be, then drag the new pattern in. There isn't a "ripple edit" mode that would push other patterns out when you drag them into the timeline.
@mathieugarcia has mentioned elsewhere that they are investigating markers and such, i would assume that ripple editing and such would be part of that investigation, Reapers regions should be looked at here for inspiration.
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As far as I can tell, there is no copy/paste wherever feature. Yes, copying the pattern overlays the next pattern...Behavior was the same in BM2...
All you need to do is move any patterns that are in the way to where they need to be, then drag the new pattern in. There isn't a "ripple edit" mode that would push other patterns out when you drag them into the timeline.
@mathieugarcia has mentioned elsewhere that they are investigating markers and such, i would assume that ripple editing and such would be part of that investigation, Reapers regions should be looked at here for inspiration.