Update README.md

JeffWang0325 · Sep 5, 2021 · 9b47a86 · 9b47a86
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@@ -11,7 +11,7 @@ For example: input source (e.g., **Folder, Image, YouTube, DroidCam, WebCam**),
 It is written in Python and uses Tkinter for its graphical user interface (GUI).
 
 # Software Environment
-| IDE                         | Visual Studio Code       |
+| IDE (optional)              | Visual Studio Code       |
 | :-------------------------- | :----------------------- |
 | Extensions                  | Python                   |
 | Programming Language        | Python                   |