In the 3D view, hold down the Ctrl key and select three surfaces that are to receive the attribute and then click on the command Surface attributes.... [Face attributes...]

-> The Area attributes [Face attributes] docking window opens.

Click on the icon .

-> The Area attributes [Face attributes] dialog box opens.

Select the desired attribute and confirm with Ok. Here is an example: SYS_FaceAttributeColor (Class for colored faces)

Because at the beginning a multiple selection had been made, now a tree structure with parent element and child elements is displayed. That means every child can be individually changed or all together by selecting the parent element.

Select the parent element.

-> The respective setting options are now displayed (here the area color [Color of face] field).

Select the desired color. The color values are calculated and entered automatically. Confirm with Ok.

You can now confirm your settings with Ok or Apply. In the first case, the attribute is applied and the dialog is closed; in the second case, the attribute is applied and the dialog remains open for further changes.

In this example, we opt for Apply.

-> All faces selected before now will show the chosen color.

Select a child element and apply another color.

Select the parent element and click on the delete icon . (In a tree structure, deleting is only possible on the parent element.)

-> All attributes are deleted.

Confirm with Ok or Apply.