If Inventory is detected when Mailbox is installed, the integration will be installed automatically. If you install Inventory afterward, you can manually trigger the integration check via the Unity toolbar: Game Creator > Mailbox > Detect and Install Integration
Adding Items to the Letter:
Click the ➕ item to include an item in the letter. Then, click inside the None field to select the item asset to be given.
Customizing Item Details:
To set the amount of the item or add special properties to the item, click the small gray list icon on the item to open the details window. Here, you can edit the amount and properties. Use the Add Properties button to include more properties.
Receiving Items from a Letter:
When the player opens the letter and clicks the item, they will receive the specified amount of the item along with its set properties.
