adding to a spline

[grue1970]

i would love to be able to add to a spline by shift+dragging on a vertex, adding a new segment. is something like this possible?

right now i basically have to create a whole other spline then attach it to an existing spline, then fuse & weld the vertices.

you know like you can shift+drag an open edge of a polygon to create a new polygon 

[grue1970]

wait a second... it looks like "create line" automatically welds the vertices!

EDIT: oh, it doesn't unless you turn on auto-weld.  ok well.  shift+drag would still be useful.