This button can be found on the Standard toolbar and can be used to quickly copy the formatting from one paragraph to another.
|Format Painter - This button copies formats from the selected text, so they can be copied to other paragraphs or slides.|
Double click it.
select all the textboxes you want to change.
press ESC to turn it off afterwards
Copying Colour Schemes
The Format Painter can also be used to copy a colour scheme from one slide to another.
To copy the colour schemes from a slide you must have the presentation displayed in Normal view with the Slides tab of the Outline/Slides pane displayed.
Click the slide that has the colour scheme you want to copy.
Select the Format Painter icon on the Standard toolbar.
Select the slide(s) you want to apply the colour scheme to.