Updated changelog and documentation

CHANGELOG.md

@@ -7,6 +7,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 ### Added
 - #2138: Improve compatibility with Remote Desktop Connection Manager v2.83
 - #2123: Thycotic Secret Server - Added 2FA OTP support
+### Changed
+- #1546: Enable resize without reconnect for RDP Version Rdc9 or higher
  
 ## [1.77.2]
 ### Added

mRemoteNGDocumentation/known_issues.rst

@@ -121,10 +121,11 @@ the following connection options are set:
 
 To prevent reconnecting, you can do one of several things:
 
+- Change RDP Version to Rdc9 or higher. Rdc9 supports resolution changes without reconnecting.
 - Change the resolution to Smart Size. This will scale the original connection area when the view window size changes. This does not preserve aspect ratio.
 - Turn off Automatic Resize. When the view window size changes, you will see scroll bars or dead space.
 
-There is no way to update the view window size without a reconnect.
+There is no way to update the view window size without a reconnect in RDP Version lower than Rdc9.
 This is an RDP protocol limitation.
 
 AltGr key combinations stop working in other apps when connected to RDP

mRemoteNGDocumentation/protocols/rdp.rst

@@ -118,7 +118,16 @@ In RDP 8, support was improved for reconnecting RDP connections for resizing ope
 RDP 9
 -----
 
-We support this protocol version, but are not yet using any of its features.
+In RDP 9, support was further improved for reconnecting RDP connections for resizing operations.
+
+.. list-table::
+	:widths: 30 70
+	:header-rows: 1
+
+	* - Property
+	  - Description
+	* - Automatic Resize
+	  - When this property is enabled and ``Resolution`` is set to ``Fit to Panel`` and the connection window is resized, the RDP connection will automatically change the resolution without reconnecting.
 
 
 RDP 10