Acard ARS-2018 User Manual page 39

ARS-2018/2018E Manual
If you want to change the size of Mirror Smart, you can click "Setup" and select
"Extend Mirror Size" as shown below.
1.
2.
1. Set a new size equal to or larger than the current one.
2. Set the maximum size.
If the current size is the maximum size, you cannot change the size again.
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