The RTF IO demo demonstrates exporting to and importing from an rich text compatible format. When clicking on the Export to RTF button, the grid is exported and the rtf file is automatically opened if a rich text editor is available.

Exporting the grid can be done with

   TMSFMXGridRTFIO1.ExportRTF('..\..\gridexport.rtf');
XOpenFile('open', '..\..\gridexport.rtf', '', '');

Note that for opening the file, the XOpenFile procedure is used that is located in the unit FMX.TMSXUtil which is compatible with all supported platforms which can handle file manipulation.