To copy and paste text from a Word document in to a slide, you need to first left click on your mouse and highlight the text you would like to copy. Now click the right mouse button and select Copy or just use the shortcut key (ctrl+C) to copy the text to the clipboard.
To paste the text you have on your clipboard in to your slide, make sure to use the correct paste button for what you want to do.
Use this button to paste in text from Word, including all formatting.
Use this button to paste in text only, all formatting will be lost.