Joke Collection Website - Public benefit messages - Why don't you display the bill information when you print it out after adding the bill to the cashier?

Why don't you display the bill information when you print it out after adding the bill to the cashier?

1, whether the paper is put backwards.

2. Whether it is thermal paper.

3. Is there a paper jam?

4. If there is no problem, reset the printer, open the paper feed box of Keyun printer, then slide the paper width guide outward to the maximum, then put the paper neatly into the paper feed box, then slide the paper width guide inward to the edge of the paper, and slowly close the paper feed box.