Katie needs to apply styles to titles and headings in a document that she has created. What is the easiest way to do this?

For Microsoft Word. Use Home and Heading Styles.

Explanation:

Headings are one of the basics and good styles for your document. It adds colors and appearance to your simple letter, memo and essays. It is very easy to execute in Microsoft Word. To do this, we can make use of the "adding a head style". We can apply the following steps:

1. On your Word application, select the text, sentence or part of the document that you want to add up the header. Just make sure that you have highlighted everything well.

2. Then click Home, then Styles and your desired Heading format (Example: Heading 2). Automatically, the head styles such as font size, font face and color will be applied to your Heading format.

You can also apply the following keyboard shortcut: Press Alt key and H and L all together.