I have a chart with multiple surfaces and made a little data manipulation tab so i can change the look of each surface. since the data for each surface can be manipulated (data base is a access DB and the surface data is generated through queries) getting the min max values from the db is taking to long. I want to display the min/max values for the "Altitude" (primary Y axis) and manipulate the color range according to the min/ max values. The color range manipulation is already implemented, but i don´t want to run through the query again just to get min max values. Can they be determined from the existing surface data?