The path to access extension setting is

Admin > Catalog > Products Manager PRO > Action > Settings

You have settings for the table list and Quick form settings.

In table settings,

1. You can define the columns that you want to show in the admin product list page.
2. Set number of products to show per page
3. Product Sorting order
4. Product Image Dimension

Quick form is used to add or edit products having only the necessary fields.

In Quick Form settings,

1. Show or hide the required fields
2. Set default values for some of the required common fields