In the PADS Layout User's guide and Reference manual, (Press F1) Go to:
Also see: "Creating a Custom Pad Shape" and "Associating Copper with Terminals"
You will find step-by-step instructions and all the information you need to create odd or irregular shaped pads.
i could not find in help menu can you explain it
You can create a copper shape with the size of your custom pad and place a terminal in the copper area
after placing terminal you can associate terminal with the copper using right mouse click after selecting either Terminal or copper