Get rid of overlay without "flatten"

[JonasD]

Dear Imagej users,

I do have a problem related with the overlay function of ImageJ: I am stitching images (16 bit TIFF) using a macro and everything works fine so far. However I am only able to view the results in ImageJ as I am using the "add image" function in the overlay menue.

Is there any way to not use the "flatten" function? The result changes my file format and reduces the image quality...

Best

Jonas