Ctrl+Shift+C to copy with tiles and vehicles.

[JackTheSpades]

Currently, if I want to quickly copy-paste a train I made for a station, the best (and really only) way to do it is to make a simple blueprint of the track, check the box to include trains, paste my blueprint a couple of times and then delete it again.

With tiles, at least it is possible to copy-paste tile layouts but only if there are no other buildings or items on top of it. If I want to copy my concrete-traintracks I once again got to make a one-time blueprint.

Since blueprints already have the ability to include trains, vehicles and tiles simply triggering this to be part of copying should be doable.
And since Shift is already part of the standard keybinings and isn't too hard to press in conjunction with Ctrl it would be fairly straight forward as a way of doing a "super copy" similar to how we already have a "force paste" with Ctrl+Shift.