CMP100 User Guide
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After this, you can select to apply this to all devices or selected devices only.
Aside from the Emergency Broadcast, this can also be used for events and other stuffs.
You can disable/enable the configuration anytime and avoid configuring the parameters
again.
3.6.2 Text Overlay
Text Overlay is for displaying TEXT messages on the STB/TV. Unlike Video Takeover
that has area options for display, Subtitle Insertion only supports to display subtitles
across the screen.