This article explains Content Pinning and how to use it in EloView 3

Choose whether your foreground app (or another process) may bring another app into the foreground using the “Content Pinning” option in device settings. When “Content Pinning” is enabled, no other application may come to the foreground, except for the EloView control panel and actions.

To Enable/Disable Content Pinning in: “Device” “Settings”; Go to “Device” “Contents on Device” for status.