The first step in the art is to for a firm defensive line of your own team in which all the defenders are playing shoulder to shoulder to each other. This line is known as the offside line and is formed when all the defenders of the team are standing in the same line.
The next basic step is to have coordination amongst each other. A Glance or a gesture by hand may do the trick and all the defenders must be familiar to the signal.
The third step is the most important one. In this part of the action, all the defenders have to keep a close eye on the player and on the ball that is being played to the attacker. This concentration spell is very vital as only on it can the team carry the line’s actual purpose.
Now the defenders must step up when the ball is finally played to the attacker. Remember that all the defenders must be in-line with each other and the moment they step up to force the offside is also synchronized.
Finally, once the ball has been played, the players must raise their arms in demand of an offside and should direct their complaints towards the side-line referee. But make sure that if the decision is not allotted in your favour, the defenders must be in a recovery position to retrieve the ball back for their team.