Extrude edge along the vector of the edge?

Support Basics & Interface
1

I want to extrude one of two vertexes along the direction indicated by their shared edge. As a computer person, I know this is probably possible. I feel silly for struggling to figure it out.

Thanks, if you can help.

2

select edge and use edge custom transform then it will move along that edge !

happy bl

3

Thanks, I’m not sure what “edge custom transform” means but I did figure this out.

You can [G] [G] to slide a vert, but I was missing the [C]onstrain that lets you run it past that edge.

The edge you can set the widget to Normal mode and it will give you an axis aligned to it.