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HP LaserJet Pro MFP M125a

How Factory reset for 125a printer
by the front product buttons

Because I have a problem copying documents
The current transcription mode is LTR

The paper size used to copy documents is A4
I want to copy the files to A4 format
All print settings on the computer are correct, working on A4 mode
My only problem is copying the files to the LTR
I want to copy on A4
How do I do it?
Also how to do a factory reset

Attached is a picture of the printer buttonshp.PNG

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