The Product Slider Extension supports the default Joomla contents.
First option is the Type, you should select the Joomlacontent.
The other option is the Theme for the Product Slider. All of the Themes are described under the Slider Themes category here.
Here you are able to setup the type specific settings. These can be different based on which of the type are you using.
Select type parameter will be set the type of the slider. Its selectable values are the following:
If you select this parameter, the category chooser will be enabled right under, and you will be able to select from which categories would you like to show the articles.
In this case the articles will be ordered on the frontend by the article's search hits.
The last uploaded articles will appear in the slider.
In this case, the featured articles will be shohwn.
With the Number of contents you can set how many items would you like to apper in the slider.
Randomize parameter will be show the articles in a random order.
Image settings parameter refers for the product images in the slider. Here you can set its dimensions, and also can choose to crop the images, or even extend them with transparent color. You can see the difference on the image below: