Index: trunk/ppStack/src/ppStackArguments.c
===================================================================
--- trunk/ppStack/src/ppStackArguments.c	(revision 16015)
+++ trunk/ppStack/src/ppStackArguments.c	(revision 16605)
@@ -116,4 +116,5 @@
     psMetadataAddU8(arguments,  PS_LIST_TAIL, "-mask-blank", 0, "Mask value for blank region", 0);
     psMetadataAddF32(arguments, PS_LIST_TAIL, "-threshold-mask", 0, "Threshold for mask deconvolution", NAN);
+    psMetadataAddS32(arguments, PS_LIST_TAIL, "-rows", 0, "Rows to read at once", 128);
     psMetadataAddBool(arguments, PS_LIST_TAIL, "-photometry", 0, "Do photometry on stacked image?", false);
     psMetadataAddS32(arguments, PS_LIST_TAIL, "-psf-instances", 0, "Number of instances for PSF generation", 5);
@@ -160,4 +161,5 @@
     VALUE_ARG_RECIPE_MASK("-mask-blank",      "MASK.BLANK");
     VALUE_ARG_RECIPE_FLOAT("-threshold-mask", "THRESHOLD.MASK", F32);
+    VALUE_ARG_RECIPE_INT("-rows",             "ROWS",           S32, 0);
 
     VALUE_ARG_RECIPE_INT("-psf-instances", "PSF.INSTANCES", S32, 0);