Click "Add Files" on the main screen of your project. Drag and drop files into the "Project Files" window or click the "Add Files" button and navigate to the location of your file.

After launching the software, click on the Add files button to insert a PDF file. You can also insert multiple PDF files to add a watermark to all those files together.

To add multimedia files to the slide, use the "Video" or "Audio" tools in the Media pane. Create additional slides by clicking the "New Slide" button on the "Home" toolbar.

Just click on the big “Add Files” button and a file-selection dialog box appears so that you can navigate to the file you want to select.

For files from Dropbox, select the ones to add and then click the Choose button (Figure D). SEE: How to use Dropbox Passwords as your password manager (TechRepublic) ...