RealObjects edit-on Pro allows customization of the entire user interface, including size, icons, colors, tool-tips and language. You can enable/disable the editor’s "Source View" as well as every single toolbar icon. You are able to group icons using a separator, change the toolbar order, or replace the standard icons with your own icons of different sizes and styles. With these flexible options, you can enforce corporate design standards and guarantee seamless integration into your application.

It is also possible to include custom toolbar buttons and custom dialogs which, for example, enable the interaction with server side applications such as databases, image repositories, etc. The editor's API further allows integrators to override the standard dialogs, such as opening and inserting HTML documents, inserting and editing hyperlinks, inserting and editing images, editing unknown tags, etc.