We have been having this problem for ages but have never figured it out.
Whenever we produce images in ArcMap our color bar is very small (Insert --> Legend) and holds very limited information. This is unlike other software we use which provides a legitimate sized color bar which also incorporates any stretching that we have made.
In my doc file attached, in the first image with the arcmap color bar i actually performed a gamma stretch to increase the blue colors but i did not get a new color bar that shoed this change. I also wonder if there is no way to get a larger color bar like most other image processing software.
Thanks a lot.