DRAW User Guide
Add and Modify Drawing Objects : Specify Points : Snap Object
Snap Object
Snap object allows new points to be positioned relative to the geometry of existing objects, using snap points.
To switch Snap object on and off, select or de-select OSNAP on the Status Bar, or press F3.
When snap object is on, if an object is being drawn and a line intersects with the snap point of an existing object, a symbol displays at the point to indicate that the snap point is present.
In the example, a line is being drawn. The orange symbol indicates that the line is intersected with a snap point of an existing object (in this case the endpoint, as indicated by a box, of a diamond).
The following types of snap point are available:
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Endpoint - endpoints of primitives.
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Midpoint - middle points of primitives.
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Centre - centre points (for example, for circles arcs or ellipses).
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Node - node points (for example, for text objects).
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Quadrant - points representing quadrants of circles, arcs or ellipses.
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Intersection - primitive intersection points.
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Extension - the cursor is attracted by virtual extensions of existing primitives.
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Insertion - insertion points of complex objects.
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Perpendicular - points of primitives, or their extensions, where the line connecting the point and the previous point is perpendicular to the primitive.
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Tangent - points of primitives where the line connecting the point and the previous point is tangent to the primitive.
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Nearest - nearest points of primitives.
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Apparent intersection - points where primitives intersect (visually), but there is no actual 3D intersection because of different depths of the primitives in space.
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Parallel - points on a virtual line parallel to the indicated primitive.
Different symbols display for each type. Each type of snap point can be turned on or off (made available or unavailable using the Object Snap tab of the Advanced Drafting Settings window. Refer to Advanced Drafting Settings for further information).
The user can retain a snap selection between different states of the same operation using the power wheel. For example, it is possible to select a linear dimension that only snaps to end points.
To use a single snap type, select the required operation, for example, linear dimension (refer to Add Annotation for further information). Press Shift and simultaneously Right-click the drawing canvas. The power wheel displays the snapping options:
Select the required snapping option. The user is only able to snap to the selected option until the operation is finished or None is selected from the power wheel.
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