update README

README.md

@@ -22,6 +22,14 @@ Some settings can be changed in your DCS saved games folder under `Config/Scratc
 
 The Scratchpads content is persisted into `Scratchpad\0000.txt` (in your saved games folder; if the file does not exist, start DCS once after mod installation/upgrade). You can also change the file in your favorite text editor before starting DCS.
 
+### Multiple Pages
+
+When DCS starts, the Scratchpad looks for all text files inside the `Scratchpad\` directory (in your DCS saved games folder that do not exceed a file size of 1MB). If there is more than one, it will show buttons (←/→) that can be used to switch between all those text files. The file `Scratchpad\0000.txt`, where the content is persisted into by default, can be freely renamed, it is _not_ necessary to use the `000x` naming scheme.
+
+## Insert Mark Point Coordinates
+
+This is unfortunately _only_ available for servers (the client hosting a server, or in singleplayer). If you are the server, there will be a `+ L/L` button below the text area of the Scratchpad that can be used to automatically append the coordinates of all currently existing mark points (the mark labels that can be added in the F10 map) to the currently opened page.
+
 ## Kudos
 
 - to [DCS-SimpleRadioStandalone](https://github.com/ciribob/DCS-SimpleRadioStandalone) which acted as a good reference of how to setup a simple window in DCS