Regular boards - one pin per board visit, 30 seconds to look. Your first board visit will be determined by the numbered sticker on your event lanyard. (The boards are color coded, so whichever color sticker you have is your first board. Then they pick a random number from 1 to *number of attendees divided by the number of boards* and people line up in number order starting with that random number.) After they've gone through everyone's first board visit, the boards are a free-for-all and you can visit any color board in any order for as many times as you can until they cut off the boards at the end of the event.
PTD boards - one pin per board visit, 5 seconds to look. At the past events, they have had 6-8 PTD boards spread out on two tables with a color wheel in the middle; you spin the wheel to determine color and they will send each person to alternating sides (right, then left, then right, then left) and whatever color you spun is the board on that side that you can look at. They have the boards covered so you can't see what's there until your time starts. Usually people towards the end of the line for the first trade opportunity will try the PTD boards first before getting in line for their normal board pick since the normal board pick can take awhile and the PTD boards go quickly.
