I can't make diagonal lines using the line tool

Every time I see tutorials of people using line tools it goes diagonal but for me to either goes side to side or up and down. I don’t know why this is happening

Click the “Ortho” control to toggle it off.

Any luck?

what is the ortho control

Hi -

In your case, the Ortho control is already off.

If you are holding the Shift key when drawing the line, make sure that the Ortho snap every x degrees setting in the Rhino Options → Modeling Aids is set to 45 degrees.