docs: add copy/paste guidance

Add information provided to resolve issue sytone#19 

Thanks @Hoempi

README.md

@@ -21,6 +21,7 @@ Use `http://localhost:8080/` to access it locally, do not expose this to the web
 - [Hosting behind Nginx Proxy Manager (NPM)](#hosting-behind-nginx-proxy-manager-npm)
 - [Updating Obsidian](#updating-obsidian)
 - [Building locally](#building-locally)
+- [Copy/Paste From External Source](#copypaste-from-external-source)
 
 ## Using the Container
 
@@ -250,3 +251,13 @@ docker run --rm -it `
   -p 8080:8080 `
   obsidian-remote:latest bash
 ```
+
+
+## Copy/Paste From External Source
+
+Click on the circle to the left side of your browser window. In there you will find a textbox for updating the remote clipboard or copying from it.
+
+![image](https://user-images.githubusercontent.com/1399443/202805847-a87e2c7c-a5c6-4dea-bbae-4b25b4b5866a.png)
+
+
+