The ASPxHtmlEditor is not just a standard web WYSIWYG HTML editor. You can also extend it and add custom toolbars and custom buttons. This makes adding custom functionality much easier.
Check out this 7 minute video which shows the process of creating the custom toolbar and buttons. It also shows the process of finding the required methods that’ll be needed for this approach. You’ll find this section helpful because it’s the same process I use when trying to figure out which method/property to use with our controls.

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