Plan sketches to model efficiently, and to maintain them easily throughout the design process. Add finishing details like fillets, chamfers, and face draft after the overall design of the model is stable.
Add constraints, and then add or edit dimensions.
Accept the default size of a sketch, and edit for the precise size after sketch shape is stabilized with constraints. Leave sketch elements undimensioned if they must change size when they are used in adaptive features.
To avoid distorting a sketch when changing dimensions, change the small values first, and then change the larger values.
To avoid distortion as it resizes, dimension the overall length and width of a sketch, but leave smaller elements underconstrained .
Dimensions constrain sketch size. Omit dimensions on portions of adaptive or other features that can change size.
In the first part sketch, the first dimension sets the scale of the sketch. After you place the second dimension, edits of the first dimension do not change the sketch scale anymore.
Combine simple sketches to construct complex shapes. If the design changes, it is easier to modify several simple sketch shapes than one complex shape.
If a design has repeating elements, sketch one and then copy or arrange it in a pattern as needed. Save sketches as iFeatures so you can use them repeatedly in other parts.
Sketch profiles with the fewest possible vertices and segments.
Use it to constrain complex sketches, and for curves that are not used in a profile or path, but could help create complex sketches.
When you create a sketch on a part face, the view reorients so the sketch plane is parallel to the display. When you finish the sketch, the view reorients to enable use of direct manipulation for completing the task. You can change this behavior.
Click Undo to remove line segments and arcs one at a time, in reverse order.
Sometimes sketch geometry interferes with creating a feature. For example, you have trouble selecting multiple profiles for an extrusion. Use the Sketch Doctor to diagnose the problem, such as checking for open loops or sketch elements on top of other geometry, then eliminate the duplicates.
When creating geometry, you can snap to a midpoint, center, or intersection. Right-click in the graphics window, and then select a snap location from the menu.