1, poor scanning quality. You can open the file in PS, and then use Ctrl and T on the keyboard to adjust the horizontal position to see if it is correct. You can pull an auxiliary line and use Ctrl and R on the keyboard to call up the ruler. At the top of the page, hold down the left mouse button and pull down.

2. Check whether there are any defects. There is some ambiguity around the words in the file. Use the eraser or paint bucket tool to frame the selection and then paint it white. You can enlarge or reduce a picture file by adding a plus sign or a minus sign with Ctrl on the keyboard, which is convenient for viewing details.