diff --git a/signalgen.py b/signalgen.py
index 60b5662..fd382d1 100755
--- a/signalgen.py
+++ b/signalgen.py
@@ -37,7 +37,7 @@ rng = np.random.default_rng()
 def show_dynamic(
     dynamic_spectra: np.ndarray,
     title: Union[str, None] = None,
-    save: Union[bool, None] = False,
+    save: Union[bool, None] = False
 ) -> None:
     """
     Show a dynamic spectra by first flattening it
@@ -264,6 +264,9 @@ if __name__ == "__main__":
 	parser.add_argument(
 		"-o", "--output", dest="output", type=str, help="Set output directory."
 	)
+	parser.add_argument(
+		"-s", "--start", type=int, help="Zoomed plot start time bin."
+	)
 	parser.set_defaults(dm=250.0)
 	parser.set_defaults(pWidth=0.001)
 	parser.set_defaults(nsamp=int(3e5))
@@ -273,6 +276,7 @@ if __name__ == "__main__":
 	parser.set_defaults(plot=False)
 	parser.set_defaults(rsamp=False)
 	parser.set_defaults(output=None)
+	parser.set_defaults(start=-1)
 	values = parser.parse_args()
 
 	#set working directory to ignored directory or set output
@@ -290,7 +294,10 @@ if __name__ == "__main__":
 		logging.info(f"Running with file {values.file}")
 		if values.plot:
 			filterbankObj = Your(values.file)
-			spectra = filterbankObj.get_data(0, 524288)
+			if values.start == -1:
+				spectra = filterbankObj.get_data(0, 524288)
+			else:
+				spectra = filterbankObj.get_data(values.start, 8900)
 			show_dynamic(spectra, f"{values.file} Dynamic Spectra", save=True)
 		else:
 			addBurst(values)