Grid On Modal Form

I have a common grid in a modal form, however it seems like the grid width is not able to extend the 100% of the form. I have set both left and right as 0 or set left to 0 and width to 100%, but the grid still about 75% of the form width. Any ideas?

Thanks

Teo

I tried setting up what you’re doing. Here’s what I got:

I’m seeing much more than 75% for the grid - it seems to be drawing with some reasonable margins, not edge to edge.

I then used the Inspect feature in the Debugger. It lets you see what margins, borders and padding is defined. We see here that Modal1_footer has 12px padding around it: