Resize PDFs: To resize the PDF, click on it and drag a corner to enlarge it or reduce it.
Move PDFs: Click on the PDF and drag it where you want to locate it. If you drag it over a topic and release the mouse, the PDF will get into that topic.
Rotate PDFs: Click on the PDF to select it. Then hold CTRL + ALT (Windows) or CMD (Mac) and drag one of the corners to turn it.
Delete PDFs: If you want to delete a PDF from your presentation, click on it to select it and press the BACKSPACE key to delete it. If you accidentally deleted a PDF and want to restore it, press CTRL + Z or CMD + Z to undo the action.
Group PDFs: To group different PDFs, select them holding your shift key on your keyboard and press CTRL + G on windows and CMD + G on Mac.
In the Keyboard Shortcuts lesson, you can download an image with the Prezi Shortcuts for Windows and Mac.