Logan-
Hopefully this is step by step and easy to follow-
To Create a Mouseover Button:
Create an original button on the page you want
click on the button to make it active and select Mouseover
in Mouseover properties select Create Mouseover
Now you have a toggle for the Original image and the Mouseover image
Click on the Mouseover image toggle, now you can select effects, fill color, font, or a .jpg on the mouseover object using the VSD program buttons. You can also adjust the size, but remember it cannot be sized to come in contact with another mouseover object.
Toggle back to Original image to make edits the same way. When done-
Save your work
As paintbrush mentioned, in VSD 7 there is a
Buttonizer tool which will give a button different 3-D effects in different colors. A button can be edited the same way using this tool.
Good Luck