In the Configurable Data Entry Section of the Flow Record Form the Location Picker will appear when a Location Name-Value Pair is defined on the current Step Definition.

The following picture shows an example:

To fill out the location data entry, take the following steps:

1. Click in the input field or click the dropdown button. This will open a list to select from.
2. Select the location of the pull down list. The pull down supports Intellisense, so if there are too many items the list, you can filter the list by starting to type any part of the Location's name.
3. When the Location is just created, it is possible you first have to refresh the pull down to let the name show up in the list box.