<samp> HTML element could be imported as span with specific formatting. Currently it's just ommited.

Provide functionality allowing a document to be thumbnailed. The customers should be able to export a document to an image.

Workaround: Use attached project. 

When the content of an entire row is copied and the caret is inserted in the left most column of a row, then the content of each cell in that row should be overwritten with the contents in the clipboard when pasted.

When such content is pasted just after a table, new row is added and filled with values.

When such content is pasted in paragraph, new table is created.

Please refer to the attached screenshots. A sample .docx file is attached. Just load it in RadRichTextEditor. 

Workaround: Handle the CommandExecuted event and change the font family after executing the paste command:

private void RadRichTextEditor1_CommandExecuted(object sender, Telerik.WinForms.Documents.RichTextBoxCommands.CommandExecutedEventArgs e)
{
    if (e.Command is PasteCommand)
    {
        foreach (var p in this.radRichTextEditor1.Document.EnumerateChildrenOfType<Paragraph>())
        {
            if (p.IsInList)
            {
                var list = this.radRichTextEditor1.Document.ListManager.GetDocumentListById(p.ListId);
                list.ActualStyle.Levels[0].FontFamily = new Telerik.WinControls.RichTextEditor.UI.FontFamily("Symbol");
            }
        }
    }
}

Add support for All Capitals (All caps) and Small Capitals (Small caps) run property. MS Word has such option in Home -> Font -> Dialog Launcher -> Font -> All Caps/Small Caps.

All letters of such runs are visualized as capital letters.

The corresponding elements in OOXML are <w:caps /> and <w:smallcaps />.

The bullets can have their own alignment. Implement import and export of this setting.

In MS Word, this alignment can be set through the Numbering dropdown -> Define New Number Format

When the caret position is inside Table and a page break is inserted, the table should be split into two tables with a page break between.

- There should be a formatting symbol for the character

- Pressing Ctrl+Shift+Space should insert the character (standard MS Word shortcut)

- Import from docx should be implemented

- The symbol should be treated as a separator between words when spell-checking

Add support for shapes, and especially for shapes with textual content. 
In OOXML, shapes are represented by the wps:wsp element, and shapes with textual content by <wps:txbx>, <w:txbxContent>.
Such shape can be added to a Word document using the Insert -> Text -> Text Box -> Draw Text Box, or through a shape's context menu -> Add Text.

Note: Do not confuse with Text/Rich Text content controls (http://feedback.telerik.com/Project/154/Feedback/Details/156478 )

Implement commands and UI for producing labels using Mail Merge. 

Behind the scenes this is implemented as Table with the proper number of table columns and rows, and eventually (depending on the setup) NEXT field (https://support.office.com/en-us/article/Field-codes-Next-field-3862fad6-0297-411a-a4e7-6ff5bcf178fd?ui=en-US&rs=en-US&ad=US) - so this will eventually require implementing NEXT field.

Note: In MS Word, this is in Mailings -> Start Mail Merge -> Labels...

Support for math type equations.