On your Deal Dashboard tap the top right three vertical dots and select "Select Deals" or "Select all Deals".
When choosing "Select Deals" you will be able to tap on the deals you would like to do enhanced searches.
The dot to the left of your deal should be filled when selected.
Once you select your deals tap "Edit Selected" at the bottom of your screen
You can then choose to turn on the batch for enhance search.
Then click the arrow at the top right when finished.