I use a ton of arrows with descriptions whenever I am doing a user flow. I do a line for this, with an arrow tip. Quick and dirty by eye then go back and make sure everything is beautifully aligned and precise throughout the flow.
I used to be able to select the anchor on Line A and the anchor on Line B and use the alignment panel to make sure those lines terminated in the exact same spot. I no longer seem to be able to do this and it’s driving me insane. With basic straight lines with only two points, I know I can just set the width evenly, but if the lines branch with out from straight lines I can no longer line the anchor points up.

When I double click on Line A, I can only edit the anchors on Line A. If I hold shift and double click Line B after Line A is selected, there is no duel vector edit mode. What am I missing?