Press? Creator? Streamer?
After you import a custom case in-game through the "Test Custom Case" feature, you can upload the case to Steam Workshop.
The Upload to Steam Workshop button can be found next to the "Start game" button of the custom case. Click the Upload to Steam Workshop button, the Steam Workshop Upload window will appear.
In the upload window:
Steam Workshop Title: This is the public name that will appear on your case’s Workshop page.
Steam Workshop Description: Use this space to briefly describe your mystery, setting, theme, or any details players should know. This description is for the Workshop listing only—it does not appear in-game.
Once both fields are filled, click the Upload button to publish your case.