I'm not sure if this is what you were asking but, according to the documentation:
Many of the commonly used tools are shown on the Tools Bar at the top of
the window. You can add additional tools to the Tools Bar by dragging them
from the Tools tab onto the Tools Bar. In addition, you can rearrange the tools
on the Tools Bar by dragging each tool to a new location on the Tools Bar.
Remember that we have two versions of EM client in the current distribution. EM 4.3 is the classic version inside the main SAS application that has a toolbar that can be modified with tools like Distribution Explorer. EM 5.x or greater is the external client that connects to a SAS server and the toolbar cannot be modified and does not have a distribution explorer. The SAS based model fitting procedures are the same in either version. Hope that helps.