You are creating a new view which contains a list applet at the top and a form applet at the bottom. Both applets are based on the same business component.

Create two views and set the No Update property to TRUE for one of them. 

Create two views and set Read Only View to TRUE when you add one to the responsibilities. 

Create two list applets and set the No Delete and No Update properties to TRUE for one of them. 

Create two form applets and set the No Delete and No Update properties to TRUE for one of them. 

Create two business components set the No Delete and No Update properties to TRUE for one of them.