Hi, Very simple question, but I didn't find any informations on that on the help. In iimage, when I insert a Y-Axis on a 2d gray-scale matrice that I've imported from IDL, the 0 is located at the left_bottom corner. Or this array represent a seismic ligne on which the origine is located in the upper-left corner. I like to know how (if it's possible) to invert the Y-Axis in a way to get the 0 inthe upper-left corner ? Thanks in Advance. Cheers. Antoine C.