Photoshop selections can transform an object similar in the way items are transformed in the vector environment. Simply be sure one of the selection tools is active for this transformation to work. For instance, choose the Move tool to transform the pixels inside of your selection.

To move a selection is a basic procedure and there are two ways of accomplishing this. This is done by using the cursor keys on the keyboard or by putting the cursor inside of your selection and dragging it. Every time the cursor key is pressed, the item you have selected will move a single pixel in the direction you have chosen. If you hold down the shift key at the same time, you can now move your selection 10 pixels for a faster edit.

While many are used to transforming layers, the same thing can be done to a specific selection. Just choose the Transform Selection tool from the select menu and a rectangle will form around the selection with handles similar to vector drawing programs. Drag the handles however you choose to resize your selection or rotate it by dragging the outside handles. If the control key is held down you can distort your selection.

There are also automatic transformation tools in the Photoshop Select menu such as feathering. What this does is blur the edges of your selection allowing the area to blend into the parts you have not selected. There are other options as well that can be found by going to Select then Modify sub-menu. The size of the selection can be increased by the Select-Modify-Expand tool where you choose the number of pixels you want to expand. If a mistake is made simply choose Select, then Modify and finally, Contract. This will allow you to play with the different functions without a permanent status.