Cheat Sheet

Incoming Trades:

First Click: invite buyer to your party.
Second Click: send trade request.
Left/Blue corner: "Busy" message.
Right/Red corner: dismiss Buyer's offer.
Right-Click: /Whois Buyer.
Alt-Click: set active offer.
Ctrl-Click: "Already Sold" message.
Ctrl-Shift-Click: "Still Interested?" message.
Click Health Globe: search for item in stash (must manually click the relevant stash tab).

Outgoing Trades:

Click: join Seller's hideout.
Click on Health Globe: send trade request.
Right-Click: /Whois Seller.
Left/Brown corner: resend offer.
Right/Red corner: dismiss your offer.

Misc:

[Lurker Pro] Click on Mana Globe: show dashboard, only works in hideout.
[Lurker Pro] Ctrl-Shift-Click on item: display "Item Lurker".
Click on Health Globe: go to your hideout, if there are no active trades.
Ctrl-R: show remaining monsters over Mana Globe.