Hi there, Does anyone know if it's possible to plot to a window, then open another window and plot to that, and then return to the original window and overplot? I've tried using WSET, but the OPLOT doesn't remember the original PLOT. In code terms it looks something like: FOR i=0,4 DO BEGIN IF (i EQ 0) THEN BEGIN WINDOW,0,TITLE='Original Plots' PLOT, array1, array2[i,*] ENDIF ELSE BEGIN WSET=0 & OPLOT,array1, array2[i,*] ; So this I want to overplot on the plot on WINDOW 0.. ENDELSE WINDOW,1, TITLE='Different Plots' PLOT, b_array1, b_array2[i,*] ENDFOR Any help / advice appreciated. Thanks, Rich