The NFL draft consist of seven rounds which should be 7 draft picks for each team but it usually doesn't work out that way. The NFL has a tendency of giving away what they call compensation draft picks to teams that were hit the hardest by free agency that year.
If the NFL is in an expansion year the new team would receive the first pick overall and a few compensation draft picks to put them on an even keel with the other NFL teams. Usually the Heisman Trophy winner is taken within the first few picks of the draft since he is considered the best college football player in the country.
When the football player is drafted he puts on the NFL team's football jersey for picture taking. This will be his first picture he has taken as a pro football player.
NFL Draft Format
The NFL draft usually works like this. The team that has the worst record the year before gets to select the first NFL draft pick. The NFL team that has the second worst record picks number two and so on all the way to the super bowl champs picking last. This keeps the NFL football teams on an even balance with each other so no NFL team could build a dynasty like the New York Yankees have done in baseball.
NFL Draft Day Trades
This could change though because that NFL team might have traded their first draft pick the year before in a trade with another NFL team not knowing they would be drafting first this coming year.
Each team then selects a college player that they either think is the best player in the crop or a player that fits their need for a position on their team. Maybe they lost a football player