Applying and Using Themes
One of the great additions to Word 2007/Word 2010 is the far-reaching themes feature. When you apply a theme to your Word document, the theme applies a set of coordinated formatting choices – including fonts, colours, table styles, chart styles, special effects, and more, throughout your document. The beauty here is that you can apply and change themes with just a click of the mouse button, and the choices displayed in the various galleries in Word are all coordinated to match the theme you have chosen for the document.
You apply a theme to your document by clicking Themes on the Page Layout tab. The palette of themes appears so that you can click your choice. If you want to change the theme later, you can simply return to the Themes gallery and click the new theme you want to apply.

The theme you choose for your document helps you make formatting choices for all the elements in your document with a single click.
Working with Galleries
Word now includes all sorts of galleries – themes, styles, WordArt, and more – that graphically display your range of choices so that you can click the design, colour, layout and style you want. You will see galleries displayed in different ways, depending on your screen resolution and the size of the Word window. The Ribbon was designed to adjust to the size of the screen, so in some cases you may see galleries appear as selections on the Ribbon, while other galleries appear as drop-down items.
Basically you’ll see galleries represented two ways in Word. Some galleries are shown as part of a group on the Ribbon; you can click the More button in the lower right corner of the gallery to display the full collection of choices. Other galleries (such as those available for Themes, Margins, and Position commands) display as drop-down galleries so that you can make your selection.

Some galleries display a few choices in the tab of a selected tab.
Other galleries open as a palette of choices, like the WordArt gallery shown below. Using galleries, you can easily see at a glance which colour combination, format, colour scheme, transition, or chart type you want. The choices you see in the galleries are connected with the theme you’ve selected for your document, which helps you be sure that when you’re choosing a chart type, for example, it reflects the colours, fonts, and effects used in other parts of your document.
To choose an option in a gallery, simply click your choice, and the setting is applied to the current document or selected object.

Some galleries open as palettes, enabling you to easily see which choice fits your document.