How do I ALLOW OFFERS on an Auction Style Listing?

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Ebay sent a special offer out this week, good through March 26th.

This special offer sent to selected ebay Top Rated sellers only.

What I do not understand in how do you allow offers on Auctions?

I'm not one to read hundreds of articles, but I thought I had a pretty good understanding of how Fixed Price (which allows BEST Offers) and Auctions which can start at any price and have a Buy It Now price as well.

However, this special offer seems to be an exception:

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Discount applies to up to 100 auction-style listings that allow offers. List or revise existing
aucti...

What is the Promotion?
Invited sellers ("Sellers") who activate the offer, and, pursuant to the terms and conditions set forth herein, list in the auction-style format during the Promotion Period, will receive a 25% discount on final value fees on up to 100 Qualifying Listings* ("the Promotion").

*Qualifying Listings are limited to the following conditions:
1. Item(s) must be listed or in the auction-style format.
2. Item(s) must be listed with the option to "Allow offers".            

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I have searched for this "Allow Offers" option and dont see it. Is it something new? Do I need to enable a listing option somewhere in selling preferences?  Anyone that has a clue, please reply. Your help and advice is appreciated!