for example suppose we have multiple images in drawable. now, how do I change the image size in android studio on the screen? also how do I change the place of the my images in drawable on the screen? Please explain to me and the best and easiest way.

Consider the angry birds game.It has a bird with specified size and specified location on the screen.now, I created my image by photoshop and I save it in drawable.How do I determine the image size and place on the screen?

thank you.