A new setting in ItemESP which turns possible to mark only the items that you want.
There are 3 options:
1. Disable (Will disable the setting)
2. Item Id (Each input name is actually an item id)
3. Item name (Each input name is the name of an item)
There's a setting named "Search List" and to the side, a button named "Edit...", click on it to open a list, if you want to mark only diamonds just toggle the "Search Type" button to "Item Id", this will consider the typed names as the item ID, on the other hand, if you want to search for specific item names, set the toggle button to "Item name" and insert the name of the item(this is case sensitive and can detect items with modified names).