Im in the same situation here. Please somebody help.
The easiest way (for me) is to create desired shape in AutoCAD and to import it in PADS. After this change shape properties from 2D line to Copper cutout.
There is a lot of ways to manipulate Copper and Copper Cutouts in PADS. Sometimes it is easier to delete a shape and recreated in place of trying deleting corners or segments and inserting new corners or segments in already created shape. Don't get me wrong it is possible and easy but it depends on what is the shape and how complex is it. If it is a cutout inside the Copper Shape, first you need to explode it before modifying.
So for something like that it is very hard to tell you exactly what steps you need to take without seeing the Copper and Copper Cutout.
Please contact Mentor Customer Support Division via email or telephone and they can help at no time.
You can create this pad very easy:
1. Create copper 7.3x7.3 mm;
2. Draw circle with R=2.7 mm, which will be copper cutout;
3. Draw 2 rectangular cutouts with dimensions 2.1x 0.95 mm.
That's all .
Draw a copper polygon, tracing the 4 corners, then the starting point of the arc, then a point on the quadrant of the arc, then the end point of the arc, then close the polygon. Select the vertex on the quadrant of the arc and select Pull Arc. You will get the curve you want. Copy and mirror it for the other half. Associate each shape to a terminal, and you got it. None of this has anything to do with deleting a copper segment.