When you have indented and justified text, it is wrongly exported to PDF:

			<w:pPr>
				<w:spacing w:after="0" w:line="360" w:lineRule="auto"/>
				<w:ind w:left="567" w:right="567" w:firstLine="708"/>
				<w:jc w:val="both"/>
				<w:rPr>
					<w:rFonts w:ascii="Calibri Light" w:hAnsi="Calibri Light"/>
				</w:rPr>
			</w:pPr>

This is only reproducible when the Run contains an empty string. If the paragraph is empty or the Run contains a space, everything is working correctly.

Workaround: Remove all empty runs from the document.

(DIPs) is a unit type used in RadWordsProcessing when setting the FontSize of a Run. If you load a document with font size in WordPad set to 20 points and load it to RadFlowDocument, its value is converted by using the following method. If the RTF content stored from WordPad is saved to HTML format with WordPad, the font size is preserved with the same unit: style='font-size:20.0pt;'. We should add the option to control the font size unit when exporting to HTML format.

At this point, the justify alignment is not supported. Provide the ability to export text with this setting.
This functionality is dependent on PdfProcessing: Provide API for setting the text alignment to Justify

Implement page border property which could be applied over the whole document or over a specific page.

Generate a document with the following approach: https://docs.telerik.com/devtools/document-processing/knowledge-base/populate-table-data-mail-merge

Before calling MailMerge, add two document variables with the editor: https://docs.telerik.com/devtools/document-processing/libraries/radwordsprocessing/concepts/fields/document-variables