Updates user preferences editor wiki entry with more content.

User-Preferences.md

@@ -1,9 +1,9 @@
 # User Preferences Editor
+You can access the User Preferences editor from the main application window via the **View** menu.
+
 The user preferences editor contains sdrtrunk application settings that the user can customize.  These
 settings are organized by category.
 
-You can access the User Preferences editor from the main application window via the **View** menu.
-
 ## Audio
 The audio tab contains settings for audio playback, recording and call handling.
 
@@ -110,3 +110,54 @@ button
 * **Calibrate** - starts the calibration process.
 * **Reset All Calibrations** - resets all calibrations to default (ie not calibrated) so that they can be run again.
 
+## Decoder
+![Image of the user preferences editor with the Decoder category and the JMBE Audio Library editor pane showing](images/user_preferences_jmbe.png "User Preferences Editor - JMBE Audio Library")
+### JMBE Audio Library
+The JMBE audio library can be used to decode digital audio frames for some decoders like APCO25 and DMR.  The
+sdrtrunk application bundle does not include the JMBE library.  However, you can download the source code for the
+JMBE library and compile it yourself and then update sdrtrunk to use that library.
+
+* **Current Version** - displays the current version of the library that's being used by sdrtrunk.
+* **File** - file location for the user-created JMBE library.
+* **Create Library** - opens a dialog to download the JMBE source code and compile the JMBE Audio Library.
+* **Check For Library Updates** - checks to see if there is a newer version of the JMBE library source code.
+* **Select** - allows you to select a compiled JMBE library file to use.
+* **Reset** - clears the currently selected JMBE library file.
+* **Alert when decoder requires missing JMBE library** - when selected, alerts you when you start a channel
+with a decoder that requires the JMBE audio library to produce audio, whenever the library is missing.
+
+## Display
+### Channel Events
+* **Timestamp Format** - selects the display format for timestamps in the Events tab for a decoding channel.
+
+![Image of the user preferences editor with the Display category and the Talkgroup and Radio ID editor pane showing](images/user_preferences_talkgroup_radio_format.png "User Preferences Editor - Talkgroup & Radio ID Formats")
+### Talkgroup & Radio ID
+Select the display format for talkgroups and radio identifiers for each of the radio protocols 
+supported by the sdtrunk application.
+
+* **Decimal** - decimal (base-10) format.
+* **Hexadecimal** - hexadecimal (base-16) format
+* **Formatted** - custom format generally used for identifiers in that protocol.
+* **Fixed Width** - formats all values to the same number of digits, using zero prefix padding as necessary.
+
+## File Storage
+### Directories
+![Image of the user preferences editor with the File Storage category and the Directories editor pane showing](images/user_preferences_file_directories.png "User Preferences Editor - File Storage Directories")
+Select default or alternate file storage locations that sdtrunk uses to store file artifacts.
+
+* **Application Root** - the root folder for all application folders.  When you change this, it changes all of
+the other folder preferences to set the root for each of them.  However, you can override these changes
+for each of the child folders.
+* **Application Logs** - application log files.
+* **Configuration** - configuration files used by sdrtrunk
+* **Event Logs** - event logs generated by the channel decoders when event logging is enabled.
+* **JMBE Libraries** - location where sdrtrunk looks for the JMBE library on startup and the location
+where the JMBE audio library will be stored when the user downloads and compiles the library.
+* **PLaylists** - sdtrunk playlist directory.
+* **Recordings** - folder where channel recordings, tuner wideband recordings, demodulated bit stream
+recordings, and MBE frame recordings are stored.
+* **Screen Captures** - storage for screen captures generated by the user.
+* **Streaming** - temporary folder used for storing audio recordings awaiting streaming.  
+
+## Source
+### Tuner Channelizer