Line command working in only 2 viewports

I am able to draw a line in perspective and top viewports but other viewports no. I am new with rhino can someone help ?

Are you using a mouse and clicking two places in one of the other viewports?
(I ask because there are other ways of creating a line as well…)

Yes that’s what I am trying to do. Cause I need to snap to a point from a certain viewport which I can’t do from somewhere else, but then I need to draw in another vieport. and yes I am using a mouse. I think it’s a snap problem cause I am having the same problem with other commands too.