Use full form setting
From Planfix
The attribute Use full form in the Planner lists settings determines how Planfix will behave when you click on an object in a list:
If this attribute is activated, a panel will appear on the right-hand side of the screen when you click an object. This panel will contain a full view of the object:
If this attribute is not activated, a reduced view of the object's card will appear:
You can configure the appearance and contents of the reduced view.