The various viewing modes
For the moment we will stay with our Mosaic effect.
There are several types of viewing: they are available in the popup menu at the bottom left of the FX stack window (see opposite).
You may view the effect on the entire image, its left half, its right half, the top or bottom… you may even modify the viewing area to your convenience by sliding the border line on the screen (to do this, left click on one of the triangles in line and slide it).
Here again, the Play button is pressed to preview your effect in real time but only on a given region of the screen.