[SalesForce] How to display Mile stone tracker in record detail page

I had a similar problem when trying to set up Case Feed in the last few days.

One item that confused me was that after making changes in the "Custom Console Components" I went back into the Console view and refreshed my browser to see if changes had taken effect - nothing seemed to have happened. HOWEVER - I was observing this on a case that was already open in the console view. Closing the Case and reopening it allowed me to see that the changes HAD taken effect. Simple - but annoying.

Another thing to look out for is to check that you are looking at the right Page Layout. Obvious I know, but even as Sys Admin it might be that you have not enabled the Page Layout for your profile.

I made a large number of configuration changes in my attempt to work out what was going wrong, so I may have done something else to get it working - including removing all the components showing in the Left and Right pane (in the Other Feed View>Other Tools & Components). But this may have been inconsequential - and the primary issue of not closing and reopening the case being the thing that was confusing me.

Perhaps my frustrating experience will help some other poor unfortunate soul who is struggling with this!

Out of the box you can't specify different fields for the view/edit/new page layouts. You can only specify which fields are editable/required/read-only. Some options to consider.

Record Type Switching

Since the displayed page layout is based on the profile / record type you can in effect create two layouts one for a new record which is displayed when creating a new object, and another layout for viewing and editing an existing record. When a new record is saved use workflow or process builder to change the record type.

Page Overrides

If custom development is an option you can override the new / edit / view pages for a case independently allowing you to display different fields in each scenario. This requires creating a visualforce page and/or lightning component.

Quick Actions

With quick actions you can create a specific form for creating cases. It won't override the 'New' button globally, but you can hide that where possible and replace it with your quick action. Once the record is created the fields displayed when viewing or editing would be driven by the page layout.