1. Set criteria on a listing and then check off all of the listings you wish to include in the base group.
Note that you will want to use a base group when you own a controlling stake of the market or when there are little to no comps in the market.
2. On the upper-right side of the tool, select (in this order): Set Up, Groups, Create Group. Then, select "Base" for the "Group type" -- create a "Group name" and save it.
3. After saving your group, the groups page will display on the upper-left side of the tool. In the groups page (starting at the top of the group with the listing you initially set criteria on), enter values in the "% Above Base" field for each listing in the group. These values will determine the percentage (or dollar amount; by clicking on the percentage icon, you can switch to a dollar amount) above the criteria/base price at which each listing in the group is priced. Make sure to click Save after entering the values.
Note that you can control broadcast status by clicking on the checkmark icon. You can remove a listing from a group by selecting the trashcan icon.
Note that you can adjust your criteria/base price by changing the floor value in the groups page.
Auto Base (AB): the base price will always be the same as the criteria price; prices move with the market
Manual Base (MB): you select the base price; prices are fixed
