The settings of the Engagement app can be modified at the Event level, in the Activity management module -> Engagement settings. Here, users can find everything for the successful setup and management of the Engagement app.
It is also possible to change these global settings per activity / session. Simply go to Activity Management -> Activities and select the specific activity you want to have different settings from the rest of your Engagement App. In the Settings tab deselect the option "Use global settings" and adjust any settings you want to change specifically for this activity / session. Don't forget to click Save to save your changes.