I would like to ask why the content on the opposite side of the page is reversed when PDF is printed on both sides (the printer is automatically printed on both sides). How should I set it?

Using Foxit Reader to print PDF files is directly set to dual-sided printing and a two-page printing. It is found that the front and back are just inverted. In fact, the front and back are both from the left and right sides, if the top, bottom, and bottom are displayed in this order, you must set the direction of the long side and short side in the dual-sided printing settings. In Foxit Reader, select the print attribute box that is printed in the pop-up print attribute box, instead of a printer selection box, followed by an attribute button, click this attribute button to set dual-sided printing. After setting dual-sided printing, there is a button under it, click this double-sided printing setting to set the direction of the long side and the short side.