In fact, everyone has used the basic things of computers and forgotten them. You can create a new powerpoint document on your computer. You know the slides. Go in and find a suitable template, and then enter the text. You can set the font size or something. Or you can add pictures, or you can choose blank templates, inserts, pictures or wordart. As long as you edit your stuff. Then: file, save as, remember to choose save as jpeg file exchange format among the following formats, name, save path and confirm. The pop-up box that comes out is only the current slide. Remember, you can save this slide to your computer for editing. When closing, you will be prompted whether it is time. If the size of the uploaded signature file is unclear or unsightly, you can re-edit the slides or download a small tool jpegresizer to modify the image size. You can go to the post bar and look at my signature file.