diff --git a/convert.py b/convert.py
index 830059c..ced1fdc 100644
--- a/convert.py
+++ b/convert.py
@@ -13,8 +13,10 @@ import screen as screen_py
 
 
 # TODO:
-# - only lookahead for 560px
+# - support 140px mode again
 # - compare to bmp2dhr and a2bestpix
+# - support LR/DLR
+# - support HGR
 
 
 def main():
@@ -30,6 +32,12 @@ def main():
         '--dither', type=str, choices=list(dither_pattern.PATTERNS.keys()),
         default=dither_pattern.DEFAULT_PATTERN,
         help="Error distribution pattern to apply when dithering.")
+    parser.add_argument(
+        '--show_input', action=argparse.BooleanOptionalAction, default=False,
+        help="Whether to show the input image before conversion.")
+    parser.add_argument(
+        '--show_output', action=argparse.BooleanOptionalAction, default=True,
+        help="Whether to show the output image after conversion.")
     args = parser.parse_args()
 
     palette = palette_py.Palette()
@@ -37,7 +45,8 @@ def main():
     screen = screen_py.DHGR560Screen(palette)
 
     image = image_py.open(screen.X_RES, screen.Y_RES, args.input)
-    # image_rgb.show()
+    if args.show_input:
+        Image.fromarray(image.astype(np.uint8)).show()
 
     dither = dither_pattern.PATTERNS[args.dither]()
 
@@ -51,7 +60,8 @@ def main():
         np.uint8))
     outfile = os.path.join(os.path.splitext(args.output)[0] + ".png")
     out_image.save(outfile, "PNG")
-    out_image.show(title=outfile)
+    if args.show_output:
+        out_image.show()
     # bitmap = Image.fromarray(screen.bitmap.astype('uint8') * 255)
 
     with open(args.output, "wb") as f: