TRENDnet TV-IP301W - Manual (Page 31)

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Overlay Image
This field is used to control the image/text overlay feature of the
camera. The options include: Enable graphic overlay, Enable
text overlay, and Enable motion detection text overlay. To
enable the feature, select the corresponding check box and
complete the required configuration.
( Note: The input overlay
graphic should be with width and height equal to 16 or multiple
of 16, maximum 160x160, and in bitmap (.bmp) format or JPEG
(.jpg) format. And Image overlay and Time Stamp function are
not supported in JPEG-QVGA and JPEG-QQVGA mode
)
For example, when you select the Enable text overlay item and
complete the related settings in the following options, you can see
the text information on the ActiveX screen.