To omit a record from the found set, hold down command (mac)/ctrl (windows) and press T.
If you want to isolate the current record in a found set of just that record (not sure how to read your original post), you can use one of the following scripted methods.
DBs not shared amongst multiple users accessing database at same time:
Show All Records
Show Omitted Only
For hosted databases:
Set Variable [$ID ; YourTable::PrimaryKeyField ]
Enter Find Mode 
Set Field [YourTable::primaryKeyField ; $ID ]
Perform Find