Thanking you in advance for the help!
- Does anyone know how to edit the "photos__item--main" size on the Venture Theme?
- I believe after doing "inspect" that the above item is the item in question.
I have managed to use this code to increase the size of the image via PC device:
- your store URL;
- page URL with the issue you mention;
- storefront password (if your store has one).
If the store is not online yet, please follow this quick tutorial to learn how to safely and temporarily share an offline/unpublished theme URL.