Final answer:
To paste text into a presentation and apply the theme's formatting, use the 'Paste Special' feature or a keyboard shortcut like Ctrl + Shift + V to match the theme's style.
Step-by-step explanation:
To paste text into a presentation and apply the theme's formatting, you should use the 'Paste Special' option or, depending on the software, a shortcut like Ctrl + Shift + V. Both of these methods allow you to paste the text such that it adopts the formatting of the presentation's theme, rather than retaining its original formatting.