I’ve only done that to rebuild them. But now a days, they don’t sell the rebuild kits at Autozone and O’Reilly’s. If you’re not rebuilding them, you need to get them to align back into the caliper and press them back down. Once they get started back in, then use a C-clamp and old break pad to compress it back down. Be careful not to damage the O ring seal in the caliper. Brake fluid will leak out when you press it back down since you stepped on the brakes too many times with the calipers off the wheel assembly. So when you start pressing them back down, some fluid will leak out as they get pressed back down.