When every side pole is in place, make sure that every guy rope is evenly tensioned and that the marquee in the centre of the pegs.

It is some times useful to find the middle peg on the short side of the marquee and line up the bottom of all the main poles with the middle peg on the opposite side of the marquee.

If the main poles are leaning slacken the guy ropes on one side of the marquee and tighten the guy ropes on the opposite side of the marquee.

When you are completely satisfied that the marquee is central and tensioned it is time to hand the walls.