Vdwall LVP615U User Manual page 37

LVP615U 使用说明
text signal image which is bigger than the current signal will overlay
on the current signal.
Threshold R /G/B ： This is used to set three thresholds
subtitles red, green and blue respectively for a particular value
between 0 to 248.
The following is the text overlay example. Text file is made by
Powerpoint. Parameters are as follow:
Main picture
3.3 Text mode
3.4 Threshold R
3.5 Threshold G
3.6 Threshold B
<threshold
248
248
248
text
37
text overlay