Question

the most effective method to horizontally center a line of text is to: divide the length of the line by two and space over that number of times from the left margin. use the automatic centering feature of your software. use the guideline method. use the tab key and space bar.

Explanation:

Most text - editing and design software have an automatic centering feature that precisely and efficiently centers text horizontally. Manual methods like dividing length and using guidelines or tab - space can be less accurate and more time - consuming.

Answer:

Use the automatic centering feature of your software.