There are a few things you need to know if you want to edit a gif in Photoshop. First, make sure that the gif is in the correct format. GIFs are typically saved as .gif files. Second, make sure that the dimensions of the gif are correct. Third, make sure that the image is properly cropped and resized. Finally, make sure that all of the layers are set to “normal” mode and checked. Once these steps have been completed, you can begin editing the gif by selecting it from within Photoshop and then using the Edit menu to change its properties.