All right. I admit there is a way. You can find the "MultiRes" command in the command panel. Click the model and choose this command. Click Generate at the bottom. The above command is activated. There is a number showing 100 on it. Is to keep. 100% number of faces. You lower this figure appropriately. He will automatically reduce your face. But don't turn too much. Too much tuning will affect the model. I hope I can help you.