Added section explaining how to change filename templates while using the wireless connection.

Calibre-wireless-connection.md

@@ -11,4 +11,21 @@ After the calibre wireless device connection is established (the red indicator o
 You can send one or more documents to your KOreader device from your Calibre Library now:
 [![Send documents to KOReader](https://github.com/koreader/koreader/wiki/screenshots/calibre_companion_send.png)](https://github.com/koreader/koreader/wiki/screenshots/calibre_companion_send.png)
 
-Note that if it's the first time you run Calibre plugin, you may be prompted to choose the "Inbox" directory in which the received documents will be saved.
+Note that if it's the first time you run Calibre plugin, you may be prompted to choose the "Inbox" directory in which the received documents will be saved.
+
+---
+
+# Changing filename template
+
+The usual way of changing filename templates doesn't work with the SmartDevice driver used for calibre wireless connection. Instead you need to customize the SmartDevice App Interface plugin directly by following these instructions.
+
+Select "Preferences" in the Calibre toolbar, then select "Plugins" under the advanced row.
+![calibre1](https://user-images.githubusercontent.com/108584186/177076311-c9deadb4-3c0c-44ab-9fee-bfdbac8142fb.png)
+
+Then search for "SmartDevice", selecting SmartDevice App Interface.
+![calibre1](https://user-images.githubusercontent.com/108584186/177076490-2ec66908-9eda-486c-91f1-a856c7672550.png)
+
+Select Customize Plugin, here you can change your filename template and click ok to save your template.
+![calibre1](https://user-images.githubusercontent.com/108584186/177076719-c6d7f5d7-0dd2-4a3d-8be0-c63383d14554.png)
+
+To understand how calibre's template language works see the instructions in the calibre manual: https://manual.calibre-ebook.com/template_lang.html