Tie Siberian hitch first, then use powercinch to tighten ridgeline
Fix tarp to ridgeline by wrapping cord around ridgeline in opposite direccions several times before tying a simple bow. This will keep the tarp from sliding along ridgeline.
Stake out the four corner guylines at an angle and tighten with tensioning hitches.
Adjust remaining tensioning hitches on the remaining cords to make tarp surface smooth and faily taut.
If poles are used to raise ceiling height, stake out each pole a two places for stability and tighten with tensioning hitches (or powercinch).