@@ -1,4 +1,4 @@
-'''IMAGE VIEWER
+'''Py IMAGE VIEWER
 
 PySimpleGUI reads images in PNG, GIF, PPM/PGM format.
 JPEGs cannot be shown because tkinter does not naively support these formats.
@@ -125,10 +125,8 @@ def up_down_arrow_key_selection(arrow_key_event):
 elif EVENT == "-FILE LIST-": # Display the image selected.
 process_and_view_image()
 
-elif EVENT == 'Up:38':
-up_down_arrow_key_selection(EVENT)
-process_and_view_image()
-elif EVENT == 'Down:40':
+# Listbox Navigation using Up/Down Arrow keys.
+elif EVENT in ('Up:38', 'Down:40'):
 up_down_arrow_key_selection(EVENT)
 process_and_view_image()