Trading
From PWI Wiki
So you want to trade some of gear with someone else, this is one of the best elements of the game.
Walk up to the person that you want to trade with. Left click on there toon. Their name will appear at the top of your screen, and then you right click on their name. A drop down menu will appear and one of the options says trade. Left click on trade.
The other person will get a notification, and will have to accept your invitation to trade. After which, a new box will open that will have what they are offering on top, and slots for the items you are offering on the bottom. Then all you do is drag and drop.
- PRO TIP****
For selecting stacked items that you want to split up... Press the ALT key and drag item to either trade slot or an available slot in your inventory. Follow prompts.