I’ll spare you my words and show you what I mean visually first.
With a system like this you will be able to select what items you want by clicking on the other player’s items. This will highlight the item in blue for both players and can be removed in two ways:
- The player who highlighted it can deselect it.
- The player who owns the item can double click it. (This will select the item to trade, then deselect it.)
Although it is a relatively simple addition, this concept can help speed up trading and make your trade private.