This panel allows you to create a non-editable COPY of a slide, from a different presentation in the Library. The new COPY slide will maintain a Parent / Child relationship to the original. If the original is updated, the update will also appear in this COPY version. When you have found the presentation you wish to copy slides from, click on it, and all the slides from that presentation are displayed in the ‘Select slides to copy’ section below. Then you can select which slide (or slides) you would like to insert in your own presentation.