2. Then select the typewriter item in the toolbar, click any blank space, and rewrite 3 into 4. You can resize 4 according to the 3 you want to change.
3. Then click the screenshot item in the toolbar to cut the blank. 4. Save. Please note that the size of the interception should be adapted to the position of the 3 to be replaced.
4. Then click the hand tool in the toolbar.
5. Press CRTL+V key in the blank, and 4 with background color will appear. The main function of this step is to select a pattern with background color to cover the item to be modified.
6. Next, use the hand tool to drag the pasted number to the position of 3, and the size can be adjusted, so that the number 3 can be blocked and the size of the content before and after can match.
7. After the final setting is completed, it is found that it has been modified.