I cannot see the dodge or burn brush size on the image open in photoshop.

Hi Guys.

This is the first time I have posted here. I am so frustrated that since updating Photoshop, I cannot see the dodge or burn brush size on an image open in Photoshop. With the older versions you could change the size with the bracket buttons and at the same time see the size of the brush on the image. 

Is this the way it is now or is there a legacy setting I can change?