Adding horizontal lines to mobile phone documents is an operation that we often need to use when writing or typesetting. This simple operation can make the document clearer and easier to read, leaving readers with a better reading experience. The following will introduce two common ways to add horizontal lines to mobile phone documents.

1. Use the "-"or "_" key in the symbol keyboard to enter the horizontal line.

This is the most common method. We can directly input symbols such as "-"or "_" on the mobile phone keyboard, and then repeatedly input multiple symbols to form a horizontal line. If thicker horizontal lines are needed, you can enter multiple horizontal lines or use symbols such as "=" or "#". This method is simple and suitable for most situations.

2. Use the text editing tool to draw a horizontal line.

If we need more complicated horizontal line effect, we can use the line tool in the text editing tool to draw a thick horizontal line. First, find the line tool in the document. Generally, in the Shape or Drawing option of the toolbar, select the horizontal line tool. Then, by dragging the mouse or finger, draw a horizontal line and adjust its color, thickness and position to meet our needs.

In a word, adding horizontal lines to mobile phone documents is a simple and practical operation, which can be realized by symbolic keyboard or text editing tools. Different methods are suitable for different situations, and we can choose the appropriate method according to the specific needs. Adding horizontal lines can make the document more neat and beautiful, improve the reading experience, and it is worth using more in writing and typesetting.