Type Default Value Read Only Static Description
Boolean false No No Whether to append to (rather than overwrite) existing image files.

This property determines whether SaveAs appends to (rather than overwrites) existing image files.

If this property is set to true and a file already exists, then SaveAs appends the rendered image to the existing file rather than just overwriting it. In this way you can build up multi-page images.

This property is used for TIFF output only.