How to create a straight line in the Z axis

[Anonymous]

Hi!

I need to know how to create a straight line in Z axis.

For example, I want to create a height line in the Z axis. But when I try to do it the line becomes inclined on the axis Y. 

How can I create a straight line in the X,Y,Z axis? 

At AutoCAD I use F8 to straight the lines, is there something like this to help me at 3DS max?

[Fahad_ALAsmari]

1-Switch to front viewport.

2-Enabled snaps toggle and right click on snaps toggle icon to enabled Grid Points.

3-Now your line will be straight 90°. 

4-Finally draw your line on the Grid Points.

*also you can make it on X-axis or Y-axis and then rotate it 90° on the Z-axis.