It seems that for some jobs, you need three hands to get it done. Your pliers can lend you that extra hand. Use the pliers to grip the wire or small piece you need to have held. Then wrap a rubber band around the handles to maintain the grip while you complete the work.
Here’s how to reglaze those old broken window panes. First, remove the old glazing compound with a propane torch and putty knife. Carefully remove the old glass and clean the (groove) with a soft wire brush. Apply a thin bead of backglazing, replace the glass, and gently place the push points every eight inches to hold the pane in. Apply a generous bead of fresh glazing compound and smooth it with your putty knife.