Most images have a resource to indicate structures of the figure which are discussed in the text of that page.
Figures that have this resource have under their legend the image of a hand holding a mouse, as in the figure below.
How to use this resource:
If you are using a desktop or notebook with a mouse place the cursor over the figure (the cursor is the image of an arrow which you move with your mouse). Another image will appear and some of the structures of interest become highlighted by a color. To return to the initial image, simply place the cursor outside the figure.
If you are using a touch sensitive screen (such as in a cell phone or tablet) click your finger or a special pencil on the image. Click out of image to return to the original image.
Test this feature with the image which you see below.
Hyaline cartilage. Staining: hematoxylin and eosin. Medium magnification.
