How can I adjust the handlebars on my bike to raise them to a more comfortable height?

To adjust the handlebars on your bike to a more comfortable height, first locate the bolt or screws on the stem of the handlebars. Use the appropriate tool to loosen these bolts or screws. Once they are loose, you can adjust the handlebars to your desired height. Make sure they are straight and aligned properly before tightening the bolts or screws back in place. Test the height to ensure it is comfortable for you before riding.