Which render mode is enabled at startup can be modified.
In the application’s Preferences UI’s under Edit -> Preferences -> Rendering -> RTX Renderers. By default none are specified, which results in the RTX Renderer determining its own default modes to enable. If any are enabled through this UI, upon restarting the application, only those will now be enabled.
With commands at startup:
--/persistent/rtx/modes/rt2/enabled=truefor the RTX - Real-Time 2.0 mode,--/persistent/rtx/modes/pt/enabled=truefor the RTX – Interactive (Path Tracing) mode, and--/persistent/rtx/modes/rt/enabled=truefor the RTX Real-Time (Legacy) mode.