comment about setting resolutionS0

Author: cgoina

src/main/java/net/preibisch/mvrecon/process/export/ExportN5Api.java

@@ -245,6 +245,8 @@ else if ( storageType == StorageFormat.N5 || storageType == StorageFormat.ZARR )
 						final Function<Integer, AffineTransform3D> levelToMipmapTransform =
 								(level) -> MipmapTransforms.getMipmapTransformDefault( mrInfoZarr[level].absoluteDownsamplingDouble() );
 
+						// at this point the pixel size has already been set
+						// - here we adjust the S0 resolution based on selected downsampling and anisotropy before exporting to N5
 						double[] resolutionS0 = OMEZarrAttibutes.getResolutionS0( cal, anisoF, downsamplingF );
 
 						IOFunctions.println( "Calibration: " + Util.printCoordinates( cal ) + " micrometer; resolution at S0: " + Util.printCoordinates( resolutionS0 ) + " " + unit);