ActiveX and VBA Developer's Guide > Advanced Drawing and Organizational Techniques > Work with Raster Images > Modify Images and Image Boundaries >
Change Image Visibility
Image visibility affects the redraw speed by hiding images in the current drawing session. Hidden images are not displayed or plotted; only the drawing boundary is displayed. To hide images, set the ImageVisibility property to FALSE. To redisplay the images, set the ImageVisibility property to TRUE.