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Go to Content > Create Content > Image
Select Browse and locate your file on your computer
Click Upload
If necessary, provide Alternative text for your image
Click Save
To get the info needed to embed your Image:
Go to /admin/content/images on your site
Find your recently uploaded image and copy the Embed Link
Select Edit on the page where you would like the image to appear and, in the Body field, paste the embed code into Full HTML
Click Save
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