To directly trade with another player, meet with him/her on the same field. To transfer commodities or credits, click the other player's name in the other ships
window on the nav screen and select Trade
. A screen similar to the following should appear:
Once you press the Transfer
button, the other player will receive the items you have selected, if s/he is on the same field. The receiver will be notified about the gift via system message, regardless of online status. Note that due to game design and technical reasons a completely secure mutual trade is not possible; the trade partners have to trust each other.