Adobe photoshop elements Manuel D’Utilisation
105
ADOBE PHOTOSHOP ELEMENTS
User Guide
4
To close the selection border, release the
mouse without holding down Alt (Windows)
or Option (Mac OS).
or Option (Mac OS).
To use the polygonal lasso tool:
1
Select the polygonal lasso tool (
), and select
options. (See “Setting options for the lasso,
polygonal lasso, and magnetic lasso tools” on
page 106.)
polygonal lasso, and magnetic lasso tools” on
page 106.)
2
Click in the image to set the starting point.
3
Do one or more of the following:
•
To draw a straight segment, position the pointer
where you want the first straight segment to end,
and click. Continue clicking to set endpoints for
subsequent segments.
and click. Continue clicking to set endpoints for
subsequent segments.
•
To draw a freehand segment, hold down
Alt (Windows) or Option (Mac OS), and drag.
When finished, release Alt or Option and the
mouse button.
When finished, release Alt or Option and the
mouse button.
•
To erase recently drawn straight segments,
press the Delete key.
4
Close the selection border:
•
Position the polygonal lasso tool pointer over the
starting point (a closed circle appears next to the
pointer), and click.
pointer), and click.
•
If the pointer is not over the starting point,
double-click the polygonal lasso tool pointer,
or Ctrl-click (Windows) or Command-click
(Mac OS).
or Ctrl-click (Windows) or Command-click
(Mac OS).
To use the magnetic lasso tool:
1
Select the magnetic lasso tool (
), and select
options. (See “Setting options for the lasso,
polygonal lasso, and magnetic lasso tools” on
page 106.)
polygonal lasso, and magnetic lasso tools” on
page 106.)
2
Click in the image to set the first fastening
point. Fastening points anchor the selection
border in place.
border in place.
3
To draw a freehand segment, move the pointer
along the edge you want to trace. (You can also
drag with the mouse button depressed.)
drag with the mouse button depressed.)
The most recent segment of the selection border
remains active. As you move the pointer, the active
segment snaps to the strongest edge in the image,
based on the detection Width set in the options
bar. Periodically, the magnetic lasso tool adds
fastening points to the selection border to anchor
previous segments.
remains active. As you move the pointer, the active
segment snaps to the strongest edge in the image,
based on the detection Width set in the options
bar. Periodically, the magnetic lasso tool adds
fastening points to the selection border to anchor
previous segments.
4
If the border doesn’t snap to the desired edge,
click once to add a fastening point manually.
Continue to trace the edge, and add fastening
points as needed.
Continue to trace the edge, and add fastening
points as needed.
5
To switch temporarily to the other lasso tools,
do one of the following:
•
To activate the lasso tool, hold down Alt
(Windows) or Option (Mac OS), and drag with
the mouse button depressed.
the mouse button depressed.
•
To activate the polygonal lasso tool, hold down
Alt (Windows) or Option (Mac OS), and click.
6
To erase recently drawn segments and fastening
points, press the Delete key until you’ve erased the
fastening points for the desired segment.
fastening points for the desired segment.