Improved CLI help

slider_app.py

@@ -59,7 +59,7 @@ def add_chart_cli(subparsers):
         formatter_class=lambda prog: argparse.HelpFormatter(prog, max_help_position=55, width=100)
     )
     parser.add_argument("chart", metavar="<chart>",
-                        help="Chart file", type=str)
+                        help="Neurolucida chart file", type=str)
     parser.add_argument("slide", metavar="<slide>",
                         help="Fixed slide", type=str)
     parser.add_argument("slide_res", metavar="<slide-resolution>",
@@ -90,15 +90,16 @@ def add_applyxfm_cli(subparsers):
     parser.add_argument("fixed_res", metavar="<fixed-resolution>",
                         help="Fixed image resolution (mm)", type=float)
 
-    parser.add_argument("moving_reg", metavar="<moving-reg>",
-                        help="Moving timg from registration", type=str)     
-    parser.add_argument("fixed_reg", metavar="<fixed-reg>",
-                        help="Fixed timg from registration", type=str)                
+    parser.add_argument("moving_reg", metavar="<reg-moving>",
+                        help="Moving timg from registration directory", type=str)     
+    parser.add_argument("fixed_reg", metavar="<reg-fixed>",
+                        help="Fixed timg from registration directory (e.g. fixed4_nonlinear.timg)", type=str)                
 
-    parser.add_argument("out", metavar="<dir>",
+    parser.add_argument("out", metavar="<resampled-img>",
                         help="Name for resampled output image", type=str)
 
-    parser.add_argument('--inverse', dest='inverse', action='store_true')
+    parser.add_argument('--inverse', dest='inverse', action='store_true',
+                        help='Invert the transformation chain')
     parser.set_defaults(method='applyxfm')