Toggle Size Constrain
I have used a third party tool to resize some images. I ran one pass to set a max width of 400px with the proportions kept relative. I ran a second pass to set a max height of 450px which only affected any portrait images. In any viewer all images look fine.
My understanding is that if an image has been resized within DreamWeaver and is not showing at its full size, then the sizes are shown in bold in Properties. It used then to be possible to click an icon so that it would be shown full size.
When I put them into DreamWeaver 2017 the images are thus being displayed at their new full size. However, the size shows in bold and there is only a Toggle Size Constrain icon, the Reset Size icon does not display.
As the images are full size, why is the size showing in bold type implying they are not.
Also, I tried to search the online help. I can find the DreamWeaver help but the only search appears to cover all products. I couldn't see a way to search Toggle Size Constrain in DreamWeaver only.

