So I believe the format for the item you'd want to add is something like this. To add the item, you'd export the items json, then add the following code to it.
{
"name": "Eastern Palace Treasures",
"type": "consumable",
"img": "images/0058.png",
"codes": "ep_treasures",
"swap_actions": true,
"initial_quantity": 3,
"max_quantity": 3
},
Then within your tracker layout, you'd add the item code ep_treasures that you defined in the items.json.
Emo, is it possible to add disabled images to consumable items?