Andy . I drew a solid region (4 squares) and set it as exposed copper. Then I gave up to have these solid regions and deleted them and drew other stuff on that place of the board. I noticed that the solid regions that I deleted still appear in 3D view and in the Gerber file. I am attaching the pictures showing the problem. ![tela1.png](//image.easyeda.com/pullimage/I3eYRElZjsYH78ugbDGCbe71Vpmi1XSMnTbKO4Hq.png) in the next image, from 3d view, look at the bottom left circle where 4 small solid rectangles appears. ![tela2.png](//image.easyeda.com/pullimage/g40Kjhn2cDdCUVALcM5Ch5CBh3lJvj5D1L2Rt11C.png) Now the screen that shows the gerber file to be sent for production: ![tela3.png](//image.easyeda.com/pullimage/LoauronycjxkJ4DaXldEk20FqqFNtDSRCCxLjbD6.png) NO matter what I do, I cannot remove the squares from the pcb layout because they were already deleted. I cannot find them anywhere on pcb layout. the pcb layout is BottomBoardV2 in my project. How can I fix this ?