ViewSonic EP4220 User Manual page 15

Picture Slide Show
Press ▲/▼ to select "Picture Slide Show", press "ENTER" to set it to "on" or "off";
USB Copy Mode
Press ▲/▼ to select "USB Copy Mode", press "ENTER" to enter sub-menu. There are options of switch off,
add, and replace for USB driver update content.
The default setting is copy all the content from USB driver to SD/CF card, it can be turned off.
"ADD" means add additional content to SD/CF card without deleting any content.
"Replace" means copy the content from USB driver to SD/CF card while delete all the existing content from the
SD/CF card.
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