In this example you can see customized "Image properties" popup. It does not contain the "ID" and "Css class" fields, "Layout" and "Spacing" fieldsets:



Try to insert/edit images . Also you can edit the image properties with the context menu.

using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using Obout.Ajax.UI.HTMLEditor;
using Obout.Ajax.UI.HTMLEditor.Popups;
using Obout.Ajax.UI.HTMLEditor.ToolbarButton;
using Obout.Ajax.UI.HTMLEditor.ContextMenu;
using System.Collections.ObjectModel;

namespace Sample
{
  // Declare the customized 'Image properties' popup class
  public class CuttedImageProperties : Obout.Ajax.UI.HTMLEditor.Popups.ImageProperties
  {
     // Suppress 'CSS class' field in the popup
     protected override TextBox ElementCSS { get { return null; } }
     // Suppress 'ID' field in the popup
     protected override TextBox ElementID { get { return null; } }
     // Suppress 'Layout' fieldset in the popup
     protected override HtmlGenericControl Layout { get { return null; } }
     // Suppress 'Spacing' fieldset in the popup
     protected override HtmlGenericControl Spacing { get { return null; } }
  }

  public partial class CuttedImageProperties_Page : Page
  {
     protected void Page_Load(object sender, EventArgs e)
     {
        // Find 'Insert image' button in the top toolbar and change the associated popup
        Collection<CommonButton> buttons = editor.TopToolbar.GetButtonsByType(typeof(InsertImage));
        if (buttons.Count > 0)
        {
           InsertImage button = buttons[0] as InsertImage;
           button.RelatedPopupType = typeof(CuttedImageProperties).AssemblyQualifiedName;
        }

        // Find 'Edit image' item in the context menu and change the associated popup
        buttons = editor.EditPanel.ContextMenu.GetButtonsByType(typeof(EditImageItem));
        if (buttons.Count > 0)
        {
           EditImageItem item = buttons[0] as EditImageItem;
           item.RelatedPopupType = typeof(CuttedImageProperties).AssemblyQualifiedName;
        }
     }
  }
}