Show or Hide the Grid Lines is very simple, either you see the lines or you don't. But I needed to make a lesson just for it.
Why?
When I started working in Pro Tools, I accidentally turned the Grid Lines off and I had no idea that was even possible. I got very frustrated and I definitely don't want you to get stuck and feel that way. It was a non-productive day after that and it took me quite a while to figure it out.
Here's how to solve that.
If the word GRID has a green background, the Grid Lines are visible.
If the word GRID has no green background, the Grid Lines are turned off, they are not visible.
Pretty simple, but if you don't know, you don't know, right?