Customizing XTools Pro toolbar
#updated
Being installed XTools Pro appears as an additional toolbar in ArcMap:
By default XTools Pro toolbar consists of 25 buttons:
As with standard tools in ArcMap, you can always add/remove any other XTools Pro tools on/from the toolbar. For that, pick up the "Customize Mode..." item from the ArcMap Customize menu and select XTools Pro in the "Commands" tab.
From the commands list on the right select a tool that you wish to put on the toolbar, drag it and drop on the XTools Pro toolbar: