A scheme is a group of settings that are stored together under a particular name. For most settings, there are standard schemes from EPLAN that you can't edit. These are stored during the installation in their own directory (by default under \Schemes\<Company name> on the drive and in the directory where EPLAN is installed). There are for example schemes for the manufacturing data export, numbering settings for devices, cables etc., workspaces etc.
If you nevertheless require own settings ever, you can create your own user-defined schemes: Through the toolbar next to the Scheme field, you can create schemes, store changes to a scheme, copy or delete a scheme. Schemes can also be imported or exported. A multiple selection of schemes is possible during importing, not during exporting.
See also