How to find the collection mode of ceramic masters

First of all, you should update the collection mode of ceramic masters to version 0.9.8. You can find it in the time machine.

After the photography studio is unlocked, you will get a decorative gallery and a studio, where you can place any number of works and props, and adjust the background and photography lighting to create a unique photo, and frame it to decorate your exhibition hall like other decorative materials.

Then I made this scene, where you can see all the works that have been sold and join the collection mode.