In Word, you can choose a set of styles that are designed to work together. Each Quick Style set may include styles for several heading levels, body text, quotes, and titles that are designed to work together in a single document.
Apply or change a Quick Style set
On the Design tab, click the More arrow in the bottom-right corner of the Document Formatting group, and then choose a style set such as Basic or Casual.
On the Home tab, the options in the Styles group change to reflect the Quick Style set that you clicked. You can then use all of the styles in the gallery to build your document.
On the Home tab, in the Styles group, click Change Styles, and then point to Style Set.
Click a Quick Style set, such as Modern.
The gallery of Quick Styles changes to reflect the Quick Style set that you clicked. You can then use all of the styles in the gallery to build your document.
[Optional] If you want to save a Quick Style as a default for all blank documents, on the Home tab, in the Styles group, click Change Styles, and then click Set as Default.
You can see how a Quick Style set will look in a document by pointing to a Quick Style set without clicking it. When you click the Quick Style set, it is applied to the document.
The Quick Style set reflects the styles that have been applied in the document. For example, if all of the headings in the document have Heading 2 styles applied, the Quick Style set will apply a Heading 2 style. The Quick Style set does not fix formatting errors.