Hi Derol,
When using the shortcode selector, there is a dropdown with city names that will populate the cityId in the shortcode. When inserted, the shortcode should look something like this:
[optima_express_search_results cityId="112" propertyType="SFR,CND" bed="3" bath="2" minPrice="400000" maxPrice="600000" sortBy="pd" header="true" includeMap="true"]
If you’re not seeing any cities on the list, it’s possible that Optima Express is not registered properly on the site or you do not have an approved MLS on your account. Trial accounts come with sample MLS data.
This article will show you how to register the plugin:
https://support.ihomefinder.com/index.php?/partners/Knowledgebase/Article/View/77/19/retrieving-your-registration-key
If you have not yet signed up for an account, you can do that in WordPress Dashboard > Optima Express > Register.
If you have further questions, feel free to contact [email protected].