How to move vertex along edge?

Support Basics & Interface
1

For example, there are 3 vertices on a straight line, ie A, B and C. How to move B along the edge only? It is easy for a vertical or horizontal edge, but what about a leaned line? thanx.

A…B…C
A…B…C

2

Put the cursor at “a” or “c” and then with the pivot mode set to cursor scale point “b” to where you want it to be.

GreyBeard

3

Set the scaling so that it is done with respect to the 3D cursor(press the dot (.) key). Select one end vertex. Shift S cursor to selection. Select the vertex you want to move, S to scale it and it will move in line with the edge.