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If the camera's playback format is mjpeg, and you configured the Captioner for this camera in Axxon PSIM (see Configuring captions display on a video image), then the subtitles will be displayed over the video image on the screen. The subtitles can be scrolled if there are many of them and they don't fit on the screen.
To hide display the subtitles , select the button.
To hide the subtitles select the button button and in the menu that opens, clear the Subtitles checkbox. To display the subtitles—set the checkbox.