Applies to: Impulse, Automap
Automap uses a feature called "follow focus" to switch between the Impulse controlling different plug-ins. Simply open the plug-in GUI for your Automap wrapped plug-in within your DAW and Automap will switch to controlling it with your Impulse.
If you have the Automap mapping editor window open this will also switch to editing the plug-in in focus.
To ensure this feature is enabled check the "Follow on screen Plug-in where possible" box in Automap's preferences.