One of the easiest ways would be to select the layer that contains the item you would like to stretch.
Ctrl + T Or Cmd + T - This tool is transform and can be found in one of the tabs above your canvas listed at the top of the program.
Using the bounding box constraints select an anchor point and drag from either side or just one side to resize to your desired requirements.
Then press enter to complete the transformation.
WARNING: Stretching your image may distort it.
Go to the move icon on the left it looks like 4 arrows.
And then just click and drag the picture or object.
PHOTOSHOP
Photoshop is picture editor,what you mean?good picture editor?best free picture editors are GIMP and Picasa,i recommend to you Picasa
no
from filter menu
Adobe Photoshop CS5
You can use photoshop or another picture editing program to digitally edit the picture.
Photoshop can do this
Adobe Photoshop CS5
Open Photoshop, open your picture in Photoshop from File>Open, then start making changes. Of course if you are unfamiliar with Photoshop, you may want to learn the basics first.
photoshop
Find the picture and right mouse click on it select copy and then paste. Remember that Photoshop pictures when saved are defaulted to its own PSD file name. If you want another file type you must load the picture in Photoshop and then you must "save as" what ever picture type you want
All of them, the Macintosh computer was made for graphics and picture editing programs such as Adobe Photoshop.