> For the complete documentation index, see [llms.txt](https://docs.devolutions.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.devolutions.net/rdm/knowledge-base/knowledge-base-articles/entry-settings/vnc.md).

# VNC

The VNC entry in Remote Desktop Manager allows users to configure and manage VNC remote connections.

{% hint style="info" %}
Set ***Display*** to Embedded (tabbed) or Undocked to enable FreeVNC, UltraVNC and IronVNC in the VNC application drop-down menu. Set ***External*** to enable RealVNC, TightVNC and VNC Viewer Plus.
{% endhint %}

![](https://cdnweb.devolutions.net/docs/RDMW6085_2025_1.png)

#### General tab

<table><thead><tr><th width="236.39996337890625">SETTINGS</th><th>DESCRIPTIONS</th></tr></thead><tbody><tr><td><strong>VNC application</strong></td><td><ul><li><strong>Default (FreeVNC)</strong></li><li><strong>RealVNC</strong></li><li><strong>TightVNC</strong></li><li><strong>FreeVNC</strong></li><li><strong>UltraVNC</strong></li><li><strong>IronVNC</strong></li><li><strong>VNC Viewer Plus</strong></li></ul></td></tr><tr><td><strong>Custom Configuration</strong></td><td>Configure host, port configuration, and arguments.</td></tr><tr><td><strong>Config filename</strong></td><td>Select the config filename.</td></tr></tbody></table>

#### Settings tab

<table data-header-hidden><thead><tr><th width="247.60003662109375"></th><th></th></tr></thead><tbody><tr><td><strong>SETTINGS</strong></td><td><strong>DESCRIPTION</strong></td></tr><tr><td><strong>VNC password</strong></td><td>Enter the password required to authenticate the VNC session.</td></tr><tr><td><strong>System authentication</strong></td><td>Enter <em><strong>Username</strong></em>, <em><strong>Domain</strong></em>, and <em><strong>Password</strong></em> for system authentication.</td></tr><tr><td><strong>Color depth</strong></td><td>Select the color depth to balance performance and visual quality.</td></tr><tr><td><strong>Zoom</strong></td><td>Adjust the display zoom level (100% by default).</td></tr><tr><td><strong>Scaled</strong></td><td>Scale the VNC session window dynamically.</td></tr><tr><td><strong>Smart resize</strong></td><td>Enable automatic resizing based on window dimensions.</td></tr><tr><td><strong>Preserve aspect ratio</strong></td><td>Maintain the original aspect ratio when resizing the session window.</td></tr><tr><td><strong>Connection timeout</strong></td><td>Set the timeout period (default 10 seconds).</td></tr><tr><td><strong>Other parameters</strong></td><td>Enter additional custom parameters for advanced configurations.</td></tr><tr><td><strong>Embedded delay (x64 only)</strong></td><td>Defines a delay in milliseconds before embedding the session (-1 ms by default).</td></tr><tr><td><strong>Request shared session</strong></td><td>Request access to a shared session.</td></tr><tr><td><strong>View only (input ignored)</strong></td><td>Allow viewing without sending keyboard/mouse inputs.</td></tr><tr><td><strong>Hide toolstrip</strong></td><td>Hide the toolbar during the session.</td></tr><tr><td><strong>Show status window</strong></td><td>Enable or disable the connection status window.</td></tr><tr><td><strong>Disable clipboard transfer</strong></td><td>Prevent clipboard data from being transfer.</td></tr></tbody></table>

#### Advanced tab

<table data-header-hidden><thead><tr><th width="281.199951171875"></th><th></th></tr></thead><tbody><tr><td><strong>SETTINGS</strong></td><td><strong>DESCRIPTION</strong></td></tr><tr><td><strong>Mouse cursor</strong></td><td>Select how the mouse cursor is handled during the VNC session.</td></tr><tr><td><strong>Emulate 3 buttons (with 2-button click)</strong></td><td>Enable 3-button mouse functionality when using a 2-button mouse.</td></tr><tr><td><strong>Swap mouse buttons 2 and 3</strong></td><td>Swap right and middle mouse buttons.</td></tr><tr><td><strong>Track mouse movement</strong></td><td>Track and synchronize cursor movement.</td></tr><tr><td><strong>Preferred encoding</strong></td><td>Select the encoding type.</td></tr><tr><td><strong>Custom compression Level</strong></td><td>Set a compression level.</td></tr><tr><td><strong>JPEG compression Level</strong></td><td>Define JPEG image compression level .Higher values reduce bandwidth but may lower image quality.</td></tr><tr><td><strong>DSM plug-in (DSM filename)</strong></td><td>Specify the <strong>DSM (Data Stream Modification) encryption</strong> plugin for enhanced security.</td></tr><tr><td><strong>Proxy host:Port</strong></td><td>Define a <strong>proxy server</strong> (IP and port) to route the VNC connection through a specific network proxy.</td></tr><tr><td><strong>Apply Windows key combinations (for exemple ALT+TAB)</strong></td><td>Control how Windows keyboard shortcuts (e.g., <strong>Alt+Tab</strong>) are processed.</td></tr></tbody></table>


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