You need to copy the image URL link and you have to click the image icon and insert your link to have a image for your signature. Also if you hover over the icon long enough you will see what each icon is for.
I believe you have to use one of these 2 button then put in the url or the link of the photo for it to work
You don't need to save the image you just need the image URL. To get an iamge URL for example if you go to google and search up a random image and right click on a image, you will see many things and find "Copy image address"
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