I have been using SW to generate manuals and other assorted CAD files. In the past I have been able to manipulate the colour of lines or blocks by either changing the line colour or the layer. For some reason last week all the lines in every drawing I have ever created turned blue. It seems that now I cannot change the colour of a line unless it it fully defined in the drawing. This was never the case before. Is there a system option which overites this? I cannot find it if there is.