If you would like to use one sheet of your diagram as the background for other diagram sheets, hover over the sheet that you want to set a background, clicnk on the … icon and select Set background. Lastly select the sheet from the selection menu which you would like to use as the background sheet.
After the selection, it will appear as a static image background on your current sheet.
Did you know?
Whichever sheet you designate as a “background sheet” will not appear in Play mode, printouts, or exported files. If you would like to include the background sheet in your presentation, make a copy of it before designating it as a background sheet.