The Toolbar is the helpful area of your screen that you will use to gain access to many commonly used options in Data Diagram design.  You can find the Toolbar conveniently located above the Design Surface at the top of your screen.  The Toolbar will display options in groups related to functionality such as Editing, Object, Data Connections, and other options.  To use these options, simply select an item in the Design Surface and use the toolbar option of your choosing to make a modification.

 

You should be aware that when you access a Dialog Bar, you may need to use the Horizontal Scrolling option to scroll left and right to view all options available to you in the Toolbar.

Figure 1:  The Toolbar displays options in functionality groups.