Background Library
In the Matter sidebar's 
library tab, the 
background library manages the groups of backgrounds and the backgrounds available in your database.
Groups of backgrounds are listed in the upper part of the library:
Icon | Description |
|---|---|
| Create a new group. |
| Duplicate the selected group. |
| Rename the selected group. |
| Delete the selected group. |
The list of backgrounds shows all of the existing backgrounds in the selected group. Using the buttons below the list, you can:
Icon | Description |
|---|---|
| Create a new background. |
| Duplicate the selected background. |
| Edit the selected background by opening the Backgrounds editor. |
| Rename the selected background. |
| Import backgrounds that you have previously saved. |
| Export the selected backgrounds. |
| Delete the selected backgrounds. |
| Purge backgrounds that have not been used (backgrounds that are not assigned to any camera sensor). |
| Modify the way in which the list is displayed. |
Right-clicking on a background opens a context menu offering additional the following options:
Icon | Function | Description |
|---|---|---|
| Set active | Make the background you have clicked active and shows it in the lower part of the library. |
| Edit | Edit the selected background by opening the Backgrounds editor. |
| Duplicate | Duplicate the selected background. |
| Rename | Rename the selected background. |
| Replace with | Replace the selected background(s) with another background from the background library. TipThis functionality is available if at least two materials already exist in the background library. |
| Usage list | Show a list of all sensors to which this background has been assigned. |
| Import | Import backgrounds that you have previously saved. |
| Export | Export the selected backgrounds. |
| Delete | Delete the selected backgrounds. |
The active background is shown in the lower part of the library:
Icon | Description |
|---|---|
Thumbnail | Double-clicking on the thumbnail opens the Backgrounds editor. |
| Use the eyedropper to pick a background from a viewport and render it active. |
| Open the Backgrounds editor for the active sensor. |
| Select the active background in the list of sensors. |
