1. Pager Count - optional - default value = 10

       You can state here how many templates should be displayed on one site

2. Grouped by - optional

       Here you can select how the SiteCollections should be grouped (Example: by ContentType)

3. Sort by - optional

       Here you can select how the SiteCollection should be sorted
5. Enable Refiner

       The Refiner gives you the possibility to show only percific SiteCollections

6. Style (css-url) - optional

       Load up a css file in a library and link it here with a full server url        

7. Logo URL - optional

       Load up a picture file in a library and link it here with a full server url