Laser printer-How to set marking distance?

Just choose one of the following two settings, both values are changing at the same time.

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Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. 
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Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. 
Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. 
Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. 
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Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. 
Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. 
Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time. Just choose one of the following two settings, both values are changing at the same time.