Pull back sheer curtains all the way to the sides to let all the light into a room. Drag each curtain to its outer side along the curtain rod. Allow them to hang straight down, alone, beneath a heavier curtain.
Leave your sheer curtains in place on the curtain rod while pulling back the curtain at mid-length with tiebacks coordinated to your curtains. Screw a curtain tieback hook midway down the wall, along the outer side of each sheer curtain. Use a tieback hook that matches your curtain rod. Hang a tieback loop from each hook. Wrap the tieback around the curtain and pull the curtain back. Attach the remaining tieback loop to the tieback hook.
Use a curtain holdback to keep your sheer curtains drawn back and in place. Use a decorative curtain holdback to match your curtain rod around which to drape a sheer curtain. Screw the hook into the wall at the point where you want the curtain to pull against the wall. Pull the curtain around the hook.