Working with Figures > Schematic Figures > To Set the Schematic Background Color in Edit Structure Mode
  
To Set the Schematic Background Color in Edit Structure Mode
1. Click File > Options. The Creo Illustrate Options dialog box opens.
2. Next to Showing, select Global.
3. On the left, select Schematics. The Schematics-Main page is displayed.
4. Set the schematic background color for sheets in Structure Edit mode using the Choose Color dialog box. For more information, see To Set a Color Using the Choose Color Dialog Box.
5. Click Apply to apply the options and keep the dialog box open, or click OK to apply the options and close the dialog box.