Hi, I am trying to add major vertical gridlines to my graph on excel. Could you explain how to do that.

I want my graph to look like this.

But I'm not being able to change what I'm getting. I get a scrambled like 1000 vertical lines when I only need a few.

0 0.5 1 1.5 2 2.5 3 Time 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3