You may trade resources only after you have rolled the dice, but before you build anything, or buy a development card. When you wish to trade resources, press the Trade button in the actions panel and the trade interface will be displayed.
On the left side of the interface are two frames; the top frame is where you specify which resources you wish to receive in a trade, and the bottom frame is where you optionally specify which resources you wish to give to other players during a trade.
Each frame contains a table, and each row of the table describes one resource. From left to right, the columns are;
Table 2.1. Trade resource controls
| Check | Controls whether or not this resource will be involved in the trade. Trade quotes submitted by either the bank or other players can only include resource types that are checked. |
| Name | The resource type. |
| In hand | Shows how many of each resource type you have in hand. If you select a valid trade, you see the amount you will have if you accept the quote. |
The Call for Quotes button underneath the two tables is used to invite other players to trade resources with you.
To the right of the tables is the list where all quotes will be displayed. The bank quotes are listed first, followed by all quotes supplied by other players. The first quote from each player is highlighted with an indicator. Next to each player quote is tick or cross which indicates whether or not you have the resources to perform the trade. As you select quotes from the list, the Accept Quote button sensitivity will also indicate whether or not you have the resources required to perform the trade. Also the amount of each resource shows a preview how many you will have if you accept the quote.
To finish trading, press the Finish Trading button at the bottom right of the trading interface.
Maritime trade is trade performed with the bank. To perform maritime trading, check one or more resources in the I Want table. If you have sufficient resources to perform maritime trading, the bank will quote for each possible trade.
Players who have built on a port with a resource label may trade two identical resources of that type for single resource of their choice.
Players who have built on a port with the question mark label may trade three identical resources of any type for single resource of their choice.
All players may trade four identical resources of any type for a single resource of their choice.
Select the trade that you wish to perform, then press the Accept Quote button.
Domestic trade is trade performed with other players. To perform domestic trading, check one or more resources in the I Want table, and one or more resources in the Give Them table. Once you have specified the resources that you wish to exchange in the trade, click the Call For Quotes button. All other players will then use the quote interface to submit quotes within the trade parameters you have set.
Select the trade that you wish to perform, then press the Accept Quote button.
When another player presses the Call For Quotes button in the trade interface, the quote interface will be displayed.
The top of the interface has an indicator to show which player initiated the trade. It also describes the trade parameters.
On the left side of the interface are two frames; the top frame is where you specify which resources you wish to receive in a trade, and the bottom frame is where you specify which resources you wish to give to the player who initiated the trade exchange.
Each frame contains a table, and each row of the table describes one resource. The player who initiated the trade controls which rows in each table can be used. If the initiating player calls for a resource that you do not have, the corresponding row in the Give Them table will be disabled. From left to right, the columns are;
Table 2.2. Quote resource controls
| Name | The resource type. |
| In hand | Shows how many of each resource type you will have in hand after performing trade. |
| Less | Press this to decrease the number of the resource you wish to receive / give. |
| More | Press this to increase the number of the resource you wish to receive / give. |
| Number to trade | Shows how many of the resource you wish to trade. |
Underneath the tables are two buttons. Press the Quote button to submit a new quote, or press the Delete button to retract a quote. Note that the Quote button will be disabled if you have already submitted a matching quote.
To the right of the tables is the list where all quotes will be displayed. Quotes from all players are listed. The first quote from each player is highlighted with an indicator.
To decline the offer to perform trading, press the Reject Domestic Trade button at the bottom right of the interface.