center, for example, enter -1 (X) and 0 (Y). The viewpoint will
move if you move the lens.
Resetting a viewpoint
Select a lens and click the Reset button in the SpriteEffects palette to
reset the viewpoint to the center of the lens object. This resets the
location values to 0, 0 if Relative is selected. If Absolute is selected,
the location is measured from the rulers zero point to the lens center.
Lenses and stacking order
The view through a lens depends on the stacking order of the lens, as
well as the position of the viewpoint.
Only objects that are behind a lens in the stacking order can be seen
through the lens. A lens and its viewpoint are at the same level in the
stacking order.
Because of stacking order, objects that you create after you create a
lens can not appear in the lens. Also, objects that you move to the
front of the stack after you create a lens can not appear in the lens.
You can select a lens, and then choose Object > Arrange > Bring to
Front to move the lens and viewpoint to the front of the stack. With
the lens in front, any object at the viewpoint can appear in the lens.
You can use stacking order to change a lens view. You can send a
lens to the back of the stack so nothing appears in it. You can bring it
to the front so all the objects at the viewpoint appear in the lens.
You can use a lens to display layered views. For example, you can
draw a map and create a lens to show a close-up of an area. If you add
text after you create the lens, the text is higher in the stacking order.
The text will not appear in the lens close-up of the map.
Freezing a lens
You can select the Frozen option in the SpriteEffects palette to
freeze the current view in a lens. This is like taking a snapshot or
rendering the image in the lens; the view wont change unless you
deselect the Frozen option. For example, if you change the fill color
of an object, the lens will not show the change. If you deselect the
Frozen option, Canvas updates the lens view.
Tip
The Frozen checkbox is only
available if you select Gray-
scale, RGB, or CMYK from the
Mode menu. If None is select-
ed, the Frozen checkbox is not
available.