Switch from Data grid to list without losing related form

These are my first steps in Glide. I am trying to create an evidence system.


I created a page with Data grid and then related form for adding records. This form is connected to a table (events) with relations to another tables (persons). For example in my form for an event planning I can add a person from related table with persons. In Data grid it is not possible to lookup data from another table. I can only change texts in fields. Is there a way how to change the grid table to list where I can edit all the data?
Because when I changed the table to list, the evidence form is empty.

Thank you.