The tab is divided in two parts. On the left, a 2D view will allow to segment images. On the right, there is a 2D view for each loaded images. If the different loaded images have the same size and voxel size (see requirements 7.2.1), the different view are synchronized (all the different view show the same brain slice).
As for the image tab you can select a 2D slice, change the window level or zoom thanks to the same buttons. The following buttons (figure 6.9) which were used to put in fullscreen a 2D view in the image tab, are now used to change the slice orientation.