If they are from the Control toolbar, you can right click any one of them
and select Properties from the popup menu that appears. You can then set the
Top and Left properties as desired. Leaving the Properties window open and
selecting a different CheckBox will allow you to set its Top and Left
properties as desired. Of course, you can do that for any control from the
Control toolbar and, of course, set any of the other properties as well.
However, there is a shortcut trick available here as well. You have to
display the Properties window by right-clicking an individual control as
described above. Once you have the Property window displayed, either
Shift-click or Ctrl-click on each CheckBox one at a time. This will allow
you to select multiple controls at once AND the properties window will
change to offer you "common" properties to all the selected controls. Change
a property value in the Properties window and it will be applied to *all*
the selected controls. So, as an example, enter 30 into the Top property and
watch all the selected controls move to that same Top coordinate.