How can I get all quads to triangulate the same way

Question

When triangulating the mesh it does this mirrored effect where the tris seem to switch direction at some points. Is there a way to make that all go the same way?

In other words. I need all the edges that separate the quads to go the same way (I've done this manually below). Their must be a better way to do this than with the knife tool.

Answer 1

Select a loop
Do Triangulate Faces
Quad Method to Fixed