Curve Direction

Hi There,

I think this is a really easy question and something i’ve done before but i’m having an absolute blank.

I’m recreating some columns so that they intercept a new roof plane, however upon regenerating them from start / end points the inherent direction of the line is such that generated column profile is at 90 degrees to what they should be.

Yes I could rotate them after generating them in Revit, however i’d like to understand how to fix it at the point at which i’m generating the line

Any thoughts how to fix it? I’ve had a google and just not getting anywhere!

Thanks kindly,