Thank you all for your help Ismael. It´s working now!!!

Claudia

This is the link for the element I want to change.
https://snipboard.io/I8T2ef.jpg
And yes the main page is not showing since I tried to change this element in the Quick Css. And I don´t kow why this happened.
I deleted de quick css but still not showing.

Thanks a lot

Hi!
I would like the 2/5 column to have a fixed 350 px width.
Screenshot:
https://drive.google.com/file/d/1nWkywoP-BzjQqxzyuCmHLaX042P6oXKF/view?usp=drive_link

Thank you for your quick response.