Question

How to improve the quality of the exported picture blocks?

Answer

In order to modify the picture quality of an exported document, you can change the JpegQuality property of the PictureExportParams object which you can access through several ExportParams objects such as RTFExportParams, XLExportParams, etc.

By default, the JpegQuality is set to 50%, so you can adjust it closer to 100% in order to improve the quality of exported picture blocks.