Extend Width of Photo Gallery/Blocks

Site URL: https://bell-crimson-ypnj.squarespace.com/

Hey All,

I'm looking at extending the width of my gallery block of photos on my homepage (and I would then replicate on other pages). However, the default size is pretty narrow and I can't seem to extend.

Is their code I can "inject" on the page, if so, I'm not sure how to do that despite reading other forums. I appogize I am new to this platform.

Here is another squarespace site I'm trying to emulate with its large and wide photo layout.

http://coreywolfenbarger.com/

Thanks!
Matt

Your site is private. Can you setup password & share url again?