Sri Jonathan's Smith's recommendation is good, but may not solve the problem of sheer volume. If not, read on ... If as you say the client really does not have and cannot obtain the base survey model from which the contours were generated…

Hello Mr. Lennon, The best way is to create an own style set for contours and display contour model with this style set. In private style set you can define masks, colours, fonts, linetypes etc. You can also use existing MX style set ie. "MfW Contour…