It would be very useful that the command Trim/Extend would work with sample lines too, it is common to work with tons of SLs, so the only useful till now, is to set an alignment on the limit you want to reach in the multi sample line cration menu, but that is still time consuming, when you think there could be a function to extend all the SLs at the same time (i.e to a polyline or line, or just objects like surface contours)
Thanks!