Troubleshooting - Content Library 360 Dialogue Box

Hello Dorothy, 

Happy to chime in!

Storyline 360 requires a minimum of 1,280 x 800 screen resolution or higher to properly display content. Can I ask if your monitor meets this requirement? If it does, try adjusting the scale property of your monitor to 100% like what Ron suggested to see if this helps. Feel free to open a case with our support team here if you need further assistance!