Required User Privileges: Company Admin / Screen Admin

The first step is to click on Manage at the bottom left corner of SalesScreen.

A menu will pop up, where you can proceed to click on Screens under the Company headline:

Once on the Screens management page, make sure the Slides tab is selected - or locate the slide in the playlist:

Once on the Playlists management page, locate the slide by scrolling to it or using the filter, order or search options. Once you can spot the right slide, click the pencil icon to edit that slide: 

Adjust the settings of your slide, and click the Save button on the bottom to save your changes.