Update mm_preset.json

mm_preset.json

@@ -41,6 +41,7 @@
     ],
     "default_aspect_ratio": "1152*896",
     "default_overwrite_step": -1,
+    "default_image_number": 1,
     "checkpoint_downloads": {
         "sd_xl_base_1.0_0.9vae.safetensors": "https://huggingface.co/stabilityai/stable-diffusion-xl-base-1.0/resolve/main/sd_xl_base_1.0_0.9vae.safetensors"
     },
@@ -51,4 +52,4 @@
         "mmxlfine.safetensors":  "https://huggingface.co/iciromaco/mm/resolve/main/mmxlfine.safetensors"
     },
     "previous_default_models": []
-}
+}