After selecting the SKU, you can't go back to see all the pictures

[LINHUA]

I. uploaded five images, as shown in the picture. 

2. respectively Set 2, 3 pictures, as the display picture of SKU: S, M. 
3. The foreground display does not have the previous 5 images, only the one specified in SKU: S, M can be displayed by clicking on it.

4. The foreground display the previous five pictures, click SKU: S, M can only display the specified picture, and can not return to see the previous 5 pictures.

I want to click on S and M to see the specified images of the five images, and I can also go back to see all the images.
Or
SKU is a separate image, and you can return to all images.

I am not sure if I have expressed myself clearly.

 

[JBW]

By default Prestashop will only show the picture of the selected combination. My module "Please choose attributes" has a feature to always show all pictures:

https://addons.prestashop.com/en/product.php?id_product=47851