Calibration related images

To make calibration targets stand out more from the background you can use a blurry backround tile image. This particular example is a blurry grid with transparency between grid lines.

If you want to use the regular calibration targets (so not presenting images as you would for infants) but you do want a more fancier attention phase you can use these (example) calibration target fill images. The fill image will rotate (unless disabled) during presentation.