I generated a drawing from an assembly in the CATIA Drafting app. I needed to draw some conceptual lines and hence sketched them on the sheet along with the view on the sheet. But some lines are black along with the view and some are bright green. See this - 

Upon exporting this in a PDF file this color is visible in the PDF as well. How can I make sure I am using the sketcher properly for this purpose? How can I ensure that I have all black lines while exporting and viewing the drawing?