You can use Insert > Button, name the button and then assign the script or action. If you use a rectangle, you can assign a script to it but it doesn't name the button for you; you must type text and place it over the button.
When you use 'Object Name' then you are naming an object (and any object can be named). This would be used in conjunction with Go To Object scripts steps for use in, well, going to an object.
If you wish to delete a layout, go to Layouts > Delete Layout. The only time FM won't let you delete a layout is when it is the ONLY layout in your file. Create a second layout then you can go back and delete your first.
Defining a button (for buttons created by Filemaker)
Text and or graphics or grouped objects can be defined as buttons under FORMAT menu.
You should check your color pallet. it may have been set for the same color as the back ground.
Thanks for your help, guys