You can use a portal on a form view layout for that.
Open Manage | Database | Relationships, find the table occurrence "box" that your layout refers to in Layout setup|Show Records From and select it by clicking it.
Click the button with two green plus signs to make a copy of this table occurrence. (This doesn't create a new table, just a new reference to the same table you already have.)
Link the two tables with the X operator to get this relationship:
YourTable::Anyfield X AllRecordsThisTable::AnyField
The X operator matches any record in one table to any record in another so a portal to AllrecordsThisTable will list all your records. (And to anticipate your next possible question, you can set up your portal rows as buttons to run a script to find different records so that it serves as a scrolling "picklist" to find and display records on this layout. A conditional format expression can even be set up to highlight the record in the portal that was used pull up the current record displayed in the "detail" fields.)
Thanks so much. I haven't used conditional formatting before but this sounds like a perfect opportunity.