Gallery page image sizing / padding issues | 7.0 Bedford

Hi everyone,

I'm having infernal trouble with what should seemingly be a simple issue. I am using Bedford template in 7.0.

I have a 'gallery page'. In it, images are automatically set side by side, with two/ three per line, depending on whether the image is portrait or landscape. The issue is that the images take up maximum 1/3 of the visible screen. I have enormous white spaces on either side of the images, and the images themselves are much smaller than | would like. I would like the two images side by side to take up all the space on the screen, and for this to continue down as you scroll with the next set of images below.

I have tried everything in site styles and the only options are to increase the white space between the images. This shrinks/ increases the sizes of  the images but they never go larger than taking up 1/3 of the screen.

The photos attached show the issue. I have searched all over the internet for relevant code and I can't find any workable answer.

Thank you for your help.

Can you share link to page where you have problem? We can check easier