Solution or Workaround
New tools added to the tool bar on the View document are not visible. If the new Tools are placed in the middle of the tool bar, tools on the right end of the tool bar disappear.
The View scalebar is placed in a fixed position on the view GUI. If many new tools are added to the tool bar, the tools positioned on the right side of the bar are forced under the scalebar.
For information about editing the Graphical User Interface (GUI), see the online help for Customizing.