Actually, when we go to image editor from the RadRichTextBox, we've got the original image's size but not the width and height in the document. When we need to format pictures of a document with equal size, we are using the document's size, not the picture's size.

Thanks 

Images with display: none could be made not-visible in the UI. The other elements could be skipped and not imported.

In MS Word, decimal tab stops affect paragraph layout in table cells even if tab character is not inserted. The reasoning is that it's hard to insert tab symbol in table cell, as pressing Tab navigates to the next cell (Ctrl+Tab should be used, or default behavior should be configured). 

For example for Input Method Editors like Marathi Indic Input, part of MS Indic Language input tool, downloadable from here: http://www.bhashaindia.com/ilit/Marathi.aspx.

Workaround: RadRichTextBox currently exposes customization point for implementing custom IMEs, see Custom IME Support: http://docs.telerik.com/devtools/wpf/controls/radrichtextbox/ime-support#custom-ime-support

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 />.

Currently, colors with alpha channel defined with 'rgba' function are not supported, for example the following:

<span style="background-color: rgba(0, 0, 0, 0.5);">Some text</span>

is imported as black color; semi-transparent colors are exported without the alpha channel.

More information: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/tt .

Note: this element is obsolete, and has the same meaning as <code>.

Currently <big> and <small> tags are not supported and the text inside is not imported.

It seems that the characters of Arabic words are reversed on export. Moreover, Arabic letters has different letter forms according to their position in the word (contextual letter forms) - beginning, end, middle, isolated. It seems that same character should be exported to PDF with different charcode depending on the character positioning. 

Check all possible shorthand properties, e.g. border-[left/top/right/bottom]. Also check CSS properties like border-[left/top/right/bottom]-[color/style/width].

Add support for inset borders for tables and table cells (Inset Line Border in OOXML).

Currently ignored words are marked only in-memory using internal properties of the document model. Make them persist, similar to what MS Word do.

Note: In the DOCX format, the document is marked as "clear" (doesn't contain spell check errors) and all misspelled words are enclosed with an errProof annotation.

Improve the performance when multiple paragraphs are selected and deleted.

Currently, when an option is chosen from the drop-downs in Page Layout -> Page Setup -> Size/Margin/Orientation/Columns, the command is executed, but the item corresponding to the current value is not selected. For example, if the caret is in a Section with A3 size, Size -> drop-down -> A3 should be selected.

Currently RadDocument contains a lot of built-in (latent) table styles, which are always shown in the TableStylesGallery. Introduce API allowing to hide some of them.

An useful option would be to export the text without the bullets in it.

Introduce an option enabling only proportional resizing to be allowed in the ImageSelectionAdorner (side middle thumbs should be disabled). The option can be added in the RadRichTextBox's ImageSelectionAdornerSettings as it already contains CanRotate, CanDrag, CanResize.

Note that Images could also support Lock aspect ratio property, which is different.

Currently, an ArgumentException is thrown when trying to import an image with negative dimensions. In this scenario, we could import the document and skip the image, or read the size of the content.

Introduce the support for the border property (with type, size, color...) for a span elements.

In OOXML, this looks like:

<w:r>
  <w:rPr>
    <w:rFonts w:eastAsia="Times New Roman"/>
    <w:sz w:val="45"/>
    <w:szCs w:val="45"/>
    <w:bdr w:val="single" w:sz="12" w:space="0" w:color="000000" w:frame="1"/>
  </w:rPr>
  <w:t>Div with border for Telerik</w:t>
</w:r>
<w:r>

Provide the ability to enter custom values (not listed in the drop-down) in Font size combo box.