Transparency of mosaic images

In order to view the images below any selected group of images and detect misalignments, the level of transparency can be changed by operating the transparency bar from the Toolbar. As shown in Figure 1, the transparency bar appears on the right of the Toolbar when the Mosaic tool is active.

 

Figure 1: Transparency bar appears on the right of the Toolbar.  

The transparency ranges from 0% (the knob on left extreme) which means that the selected images are completely opaque,  to 100% (knob on the right extreme) which means that the images are completely transparent. An intermediate value is obviously the best way to detect missalignments as shown in Figure 2.  

Figure 2: Effect of changing the level of transparency of an image of the mosaic.  

To change the transparency, select an image by clicking on it. To select more images, click on each of them while pressing Shift. The selected images are shown with a surrounding red box as depicted in Figure 2. After the selection is made, drag the transparency bar that appears on the right of the Toolbar.