Squarespace Layout & Gallery Updates

I am looking for a squarespace specialist that can use a tiny block of code to tweak appearance of site. There are no content changes. The issues are structural. The main issue that I would like to fix is how the media fits on the screen... (Budget: $30 - $250 USD, Jobs: CSS, Frontend Development, Graphic Design, HTML, PHP, Squarespace, Web Design, Web Development, Website Design, Website Optimization)