If your presentation contains text with a format you want to use, you can copy that text's format and apply it to other text on the slide (or other slides). To copy text formats, perform the following steps:
If you want to apply a format to different text lines or even different text boxes on a slide or slides, double-click the Format Painter button. Use the mouse to apply styles to as many text items as you want. Then, click the Format Painter button again to turn off the feature.