Help with Theme modification

Hello fellow developers,
I am trying to ‘compress’ a theme to eliminate some white space in both the grid & form applications.
Especially around the toolbar, above and below.
I have created the new theme and have eliminated the white space above the grid toolbar. I cannot find where to remove it from below the toolbar.
And I’m having no success in finding where to do the same on the form application.
Any direction is much appreciated.
I will upload a screenshot to show exactly where the white space is that I’m trying to reduce.
Thank you all in advance,
Bill Walker