I can't get Visio 2013 to create a line tangent between two curves. I know I've been able to do this in past versions, but I don't know how many versions back that was or how long ago it was.

I have read everything that comes up in google searches and watched the VisGuy video from 2009, but it doesn't seem to apply to new versions of Visio.

I can get the tangent line started from one curve (it turns blue now, not red like it did a decade ago). When I bring the tangent line close to the second curve, it snaps to geometry and turns yellow. It will never snap to a point defined as tangent to the second curve.

I have tried with circles, ellipses & freeform curves in all combinations and starting from both curves. I can't get it to work.

I have Snap set to Shape Extensions & Shape Geometry only. Drawing Aids is enabled. I have Curve Interior Tangent enabled in Advanced tab.

Any help would be appreciated. Thanks,