Allow to export other sheets as .png

When making several sheets to a diagram, it seems it is not possible to export other sheets as png. I don't see any option during the export process, and no matter the selected sheet when exporting the diagram to .png, only the front sheet is exported.

Any of the following suggestion would do the job for me:

• Exporting the current sheet
• Selecting the sheet to export
• Creating one png per sheet during the export process

Right now I don't really see the point of having several sheets in one diagram as we cannot export them.

Thanks & Regards !