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Choose Layout > Snap To > Smart Mouse to turn on the Smart
Mouse. A check mark shows that Smart Mouse is active.
Note: Be sure Snap To Grid (in the Layout > Snap To menu) is off
when you use the Smart Mouse. If Snap To Grid is on, the pointer
will snap to the grid and not to active Smart Mouse constraints.
Smart Mouse constraints
Identifying multiple constraints
Up to two Smart Mouse constraints can be met at the same time. For
example, you can drag an object in such a way that it triggers both the
horizontal constraint and object corner constraint. Although you can
activate several constraints, only two constraints can affect the
pointer at once.
When this constraint is active
Smart Mouse snaps objects and constrains the pointer to
Angle
A specified angle
Diagonal
Straight diagonal movement all multiples of 45º
Horizontal
Straight horizontal movement 90º and 270º, or 0º and 180º, depending on
the current coordinate system
Vertical
Straight vertical movement 0º and 180º, or 90º and 270º, depending on
the current coordinate system
Length
A specified length in points (based on 100% magnification)
Multiple Angle
All multiples of the specified angle
Object Corners
The corners of the bounding boxes of vector objects
Object Edges
Edges of the paths of vector objects (not their bounding boxes); when Object
Edges is active, other constraints dont affect the pointer
Object Fractions
A specified division of vector objects; for example, specify 1/2 to snap to the
center of objects
Object Points
Any anchor point on the paths of vector objects
Object Segments
Specified divisions of the segments of vector objects; for example, the
pointer snaps to the midpoints of segments if you specify 1/2
Tangent & Perpendicular
Movement in a straight line, tangent or perpendicular to vector objects