You can move a selection border around
an image, hide a selection border, and invert a selection so that
the previously unselected part of the image is selected.
Note: To
move the selection itself, not the selection border, use the Move
tool. See Move a selection.
Using any selection tool, select
New Selection from
the options bar, and position the pointer inside the selection border.
The pointer changes to indicate
that you can move the selection.
Drag the border to enclose a different area of the image.
You can drag a selection border partly beyond the canvas boundaries.
When you drag it back, the original border reappears intact. You
can also drag the selection border to another image window.
Original selection border (left), and selection border moved
(right)
You can apply geometric
transformations to change the shape of a selection border.
Choose View > Extras. This
command shows or hides selection edges, grids, guides, target paths,
slices, annotations, layer borders, count, and smart guide.
Choose
View > Show > Selection Edges. This toggles
the view of the selection edges and affects the current selection
only. The selection edges reappear when you make a different selection.
You can use this option to select an object
placed against a solid-colored background. Select the background
using the Magic Wand tool and then inverse the selection.