Slip a zip tie through the end link one of the chains. Put the zip tie around the top bar on one side of the tent, and secure.
Pull the chain straight down to the ground, and drive a stake through the last link, holding the chain taut. Weights can be used instead on asphalt or other hard surfaces.
Move approximately 4 inches down the top bar and add another chain.
Slip S-hooks through one link on each chain, making sure they are of even height. Hang your painting on these hooks.
Repeat the process to add more display area in your tent. Each set of chains will typically hold two to four paintings, depending on size.