How to open a page in Fluid Mode

Hi everyone.

I'm new here. I found out that I can edit my mobile view independently from the computer view in Fluid Mode. The only problem is that I don't know how to activate Fluid Mode for a website I'm working on. 

Thanks for your help. 

If you're running a website in Squarespace version 7.1 you should see buttons on each section that say "Upgrade", clicking that will switch to the fluid engine editor.

If your website is on Squarespace 7.0 then fluid engine will not be available to your website.