Its easy to build custom gutters – in the example above we have a new item available – ‘Custom Presentation’. When this is active on an item it shows:

Behind the scenes there is very little code to achieve this:

using System;
using System.Linq;
using ###.DataSource.Cms;
using Sitecore;
using Sitecore.Data.Fields;
using Sitecore.Data.Items;
using Sitecore.Diagnostics;
using Sitecore.Globalization;
using Sitecore.Shell.Applications.ContentEditor.Gutters;

namespace ###.Domain.Cms.Specialization.Shell.Applications.ContentEditor.Gutters
{
    /// <summary>
    /// Shows icon if layout field on item doesnt use presentation value set on __StandardValues
    /// </summary>
    public class PresentationGutter : GutterRenderer
    {
        protected override GutterIconDescriptor GetIconDescriptor(Item item)
        {
            Assert.ArgumentNotNull(item, "item");

            Field layoutField = item.Fields[FieldIDs.LayoutField];

            //ItemKeys.Home is a hard coded Guid elswhere in the app
            if (layoutField == null || !item.Axes.GetAncestors().Any(a => a.ID.Guid == ItemKeys.Home))
            {
                return null;
            }

            if (!String.IsNullOrEmpty(layoutField.Value) && !layoutField.ContainsStandardValue)
            {
                GutterIconDescriptor descriptor = new GutterIconDescriptor();

                descriptor.Icon = "applications/16x16/document_into.png";

                descriptor.Tooltip = Translate.Text("Item doesn't have same presentation as standard values");

                return descriptor;
            }

            return null;
        }
    }
}

Gutters then need to be added to the core database at ‘/sitecore/content/Applications/Content Editor/Gutters‘

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