There are a couple different approaches to get the functionality suggested in your file kreacja_120x600 (large central image on top with 6 thumbnails arranged on the bottom).
Simplest is to start with the Adwords template "Dynamic Remarketing Thumbnail with Pagination". This is set up with thumbnails already, although only 2 thumbs are used in the 160x600. If you are comfortable working with Javascript, you can extend that template to show 6 thumbnails and change the events so the trigger is a click action instead of the rollover used in the template.
Another good way to do this is to drag the Gallery Navigation component from the Components panel into your design and in the Properties panel select the "Use thumbnails" option (see screenshot), although the arrangement of thumbnail icons may not be as shown in your layout it will be an easy way to show all 6 products.
Hopefully one of these methods will get you going,
Kent
Google Web Designer team
![](https://lh3.googleusercontent.com/-ow7lpX_rmVM/WoHNHnWstSI/AAAAAAAADeU/TTVmQWpl8MQfY7iVEk-6h1Sm-K-fHXfRwCLcBGAs/s1600/Screen%2BShot%2B2018-02-12%2Bat%2B9.05.06%2BAM.png)