The Shrink command, which
reduces the size of a selection.
command increases the size of a
selection in the current image. It works in a similar way to the
Activating the Command
Description of the “Grow Selection” dialog
The “Grow Selection” dialog window
Grow selection by
You can enter the amount by which to increase the selection in
the text box. The default unit of measurement is pixels, but you
can choose a different unit by using the drop-down menu.
A Peculiarity of Rectangular Selections
When you grow a rectangular selection, the resulting selection has
rounded corners. The reason for this is shown in the image below:
Why growing a rectangular selection results in rounded corners
If you do not want rounded corners, you can use the Rounded
Rectangle command with a 0% radius.