How to type the horizontal bar on the head of the number?

Step 1: OK, you want to remove the "highlight" (move the mouse to the first word in front, then hold down the left button, then Move the mouse to the word after the last word (only release the left mouse button)

Step 2: Click "Format" at the top of the window, and then click within the "Font" item

Step 3: In the "Font" dialog box, check the box in front of the "Affected" column, with "Strikethrough" and "Double Strikethrough"

Step 4: Strikethrough or Double Strikethrough. Then click "OK" to complete.

----- ------------------------

Strikethrough syntax

For example, to strikethrough syntax for "Knowledge" in four calligraphy pairs

Knowledge

Stolen from somewhere else.... ..I hope you can use it..