Hi Tom Tham,
All build-in controls that uses RadEditor have a custom Document, Image and Link managers. This managers allow you to add items from Images and Documents module. The Image manager uses img tag when you insert an image
"Graduation group photo"
The tag is not replaced on the front end, because the image is correctly displayed by src tag. You could give a try to our demo website
. If your approach is different, please send us some steps and screenshots that represents the steps you follow.
the Telerik team
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