2009

When you start a new line, arc, or circle from an existing line, Autodesk
Inventor can infer a coincident constraint to the midpoint, endpoint, or
interior of the line.
■ Use SHIFT to drag.
All drag features, except for a tangent spline, are also available by pressing
and holding SHIFT while moving the cursor.
■ Drag multiple lines, curves, or points at the same time.
Select the geometry, and then drag the last item you selected.
■ Switch between the Trim and Extend tools.
Press SHIFT or select the other tool from the context menu to switch
between Trim and Extend.
Constraining Sketches
Constraints limit changes and define the shape of a sketch. For example, if a
line is horizontally constrained, dragging an endpoint changes the length of
the line or moves it vertically, but does not affect its slope. You can place
geometric constraints between two objects in the same sketch, or between a
sketch and geometry projected from an existing feature or a different sketch.
Constraints are automatically applied when you sketch. For example, if the
horizontal or vertical symbol is displayed when you create a line, then the
associated constraint is applied. Depending on how accurately you sketch,
one or more constraints may be required to stabilize the sketch shape or
position.
Although you can use unconstrained sketches, fully constrained sketches result
in more predictable updates.
NOTE The term constraints is often used in Autodesk Inventor to refer to both
geometric constraints and dimensions. Remember that dimensions and geometric
constraints work together to create a sketch that meets design intent.
Add Constraints
Define your design intent by adding geometric constraints to the sketch. You
can use autodimensioning to confirm whether a sketch is fully constrained
and apply any needed constraints. You can also create constraints by inference
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