diff --git a/src/bin/topola/main.rs b/src/bin/topola/main.rs
index 3d1016c..0c0ebda 100644
--- a/src/bin/topola/main.rs
+++ b/src/bin/topola/main.rs
@@ -13,16 +13,19 @@ use topola::specctra::design::SpecctraDesign;
 #[derive(Parser, Debug, Default)]
 #[command(about, version)]
 struct Cli {
+    #[arg(value_name = "SPECCTRA DESIGN FILE",
+	  help = "Specify the Specctra Design (*.dsn) file input file for the Topola autorouter")]
     input: PathBuf,
-    #[arg(short, long, value_name = "FILE")]
+    #[arg(short, long, value_name = "FILE",
+	  help = "Specify the output Topola session file (*.ses)")
+    ]
     output: Option<PathBuf>,
-    #[arg(short, long, value_name = "FILE")]
+    #[arg(short, long, value_name = "FILE", help = "TODO")]
     commands: Option<PathBuf>,
 }
 
 fn main() -> Result<(), std::io::Error> {
     let args = Cli::parse();
-
     let design_file = File::open(&args.input)?;
     let mut design_bufread = BufReader::new(design_file);