Custom RDP parameter options are supported when an RX-RDP device is operating in RDP client mode. The 'Custom parameters' option can be used to specify additional parameters (command-line options) for the FreeRDP client used by the device for establishing RDP connections.

In RX-RDP firmware version 2.2.0 and higher, the thin client allows specifying custom parameters for RDP connections. Please refer to FreeRDP documentation (https://github.com/FreeRDP/FreeRDP/wiki/CommandLineInterface) for the information about supported parameters. If multiple custom parameters must be specified then they should be separated by the “;” (semicolon) character.