So I was put on a project for my school, and they use wordpress for alot of stuff, but I have been put on a team that handles our digital signage. For some odd reason our displays form a scroll bar and a white line at the bottom of the picture. This goes for all of our signage. I was trying to make it responsive so that it would adapt to the different screen size that it is going to be displayed on, but there is no way to edit it. Its under the pages tab. What do I do… I have read… youtubed and searched high and low. If you guys could help me that would be awesome.

Under Appearance / Customize there’s a section called Additional CSS in many themes.
If you can figure out the selectors you need to tweak the CSS for the signage page, you can use that WP feature to fix these display glitches.
Or, you can try a free and well-regarded plugin called Code Snippets for the same purpose.
what’s the domain name? or could you provide a screenshot?
All the pictures are 1920 by 1080 pixels I was told our digital signage is created under the pages column on the leftside. I was looking for like a editor or code editor. Sorry but I really thought this was going to be a simple code to make it responsive… But I was wrong.
It is responsive. Add this rule to your CSS `img { display:block; margin:0; padding:0; }`
You can do this in Appearance > Customize > Additional CSS.