Cool tricks. Change the drawing background.
Open required picture in paint.
Rename it as sheetbackground1. Select file type .bmp.
Before this step close solidworks and back up original in the folder. copy and replace your file to "C:\Program Files\SolidWorks Corp\SolidWorks\data\Images\drawings" (this path maybe vary in your pc)
change the settings tools>option. uncheck the box.
Enjoy for different pictures.