I am working on my client's website (currently password protected) and I don't see any options to switch to a mobile version and make design changes. Every video I look at the controls on their screen look different from ours. Do we need to upgrade our account? Activate Fluid Engine? I don't see an option for the later even after reviewing this page: https://support.squarespace.com/hc/en-us/articles/6421525446541-Editing-your-site-with-Fluid-Engine#toc-upgrade-classic-editor-sections
We don't have sections, just blue plus symbols at the top and bottom of a text block, spacer, or image. If I click on it I can add any other block but section is not an option. Hitting G doesn't bring up the grid either.
Any suggestions? I just want to edit padding and layout for responsive designs without have to code it all via CSS.