I want to change shape of pads from round to oval for custom pcb which make through etching. I tried to change shape by selecting individually all pads but this is time consuming process. Is there any way to select all pads at once and change shape. (not using CTRL key). TIA
Brand new interactions and interfaces. 
Easy to use and quick to get started. 
Select a pad;
Right-click > Find Similar Objects:
Make your selection the click Find:
Make your layer selection:
Make your shape selection:
Done:
Make you height/width selection (remember that pads may have been rotated since initial placement):
Done: