I just started to use today. I have edited an image. I saved it. But it is saved in .PSD. How can I change it GIF, JPG or BITMAP?

I just started to use today. I have edited an image. I saved it. But it is saved in .PSD. How can I change it GIF, JPG or BITMAP?

I just started to use today. I have edited an image. I saved it. But it is saved in .PSD. How can I change it GIF, JPG or BITMAP?