Resizing objects or scaling objects accomplish the same result using two different methods. Remember there is a limit as to how large you resize or scale an object based on the pixel count or image size and pixel density. If the image gets too large it becomes pixelated.
Resizing an object
To resize an object you must be able to grab the object corners, or boundries. In Photoshop this is done using two commands in order.
Scenario 1 - Object is in it's own layer
1.) Select the layer containing the object
2.) Select - > All (or CTRL-A)
3.) Edit -> Free Transform (or CTRL-T)
4.) Click and drag the anchors to stretch or shrink the object.
Holding the shift key down while moving an anchor will "snap it" to the compass directions. N,E,S,W,NE,SW, etc.
Clicking the ESC key will cancel the command.
Right clicking on the image will bring up other sizing options like rotate, skew, etc.
5.) When resizing is complete, press the enter key.
Scenario 2 - Object is in a layer combined with other objects.
1.) Use one of the selection tools to select the object to be resized. The dashed line indicates the selection.
If you are not happy with the selection you can press <CTRL+D> to deselect, or
<CTRL-Z> to undo.
2.) Edit -> Free Transform
(or CTRL-T)
3.) Click and drag the anchors to stretch or shrink the object.
Holding the shift key down while moving an anchor will "snap it" to the compass directions. N,E,S,W,NE,SW, etc.
Clicking the ESC key will cancel the command.
Right clicking on the image will bring up other sizing options like rotate, skew, etc.
4.) When resizing is complete, press the enter key.