Key point tab

Use the Key point tab of the Position dialog to select a position at a specific key point on the selected object. This is useful where more than one object has key points at the same position and (for example) you want to snap to a hidden key point on a specific object. Key points are a quick and convenient method for selecting specific objects.

Tip: You can select composite curves when you are using the Key point page of the Position dialog:

Workspace — Select the workspace you are working in. The available options are:

• Relative — The position being defined is relative to another position which becomes the origin of the workspace. The positions are aligned with the active workplane or the global workspace if no workplane is active.

  Relative mode is not always available since there may not be a suitable relative co-ordinate. In this case, select a suitable position (such as the intersection of two lines) and make it the origin of a relative workspace with the Become Originoption.

• Workplane — The position being defined is relative to the active workplane if one exists.
• World — The position being defined is relative to the global coordinate system.
  Note: If any items are locked, the locks are discarded when you select a different workspace.

Object — Select an object. The name of the object is displayed.

Key point — This determines which point on the object is selected. Select from the following options:

• Centre — This applies to the centre point of arcs and circles.
• Start and End — This can apply to any object as they all have start and end positions.
• Point Number — This is intended for use with curves that can have many positions along their length. The Point Number box activates where you enter a number.

Become origin — Click this button to position the origin at the coordinates specified in the dialog. Any relative coordinates are measured from this origin.

Apply — Inputs the position. If the current operation allows multiple points, the dialog remains displayed ready for you to enter more points. Otherwise, the dialog is closed.

OK — Inputs the position and closes the dialog.

Cancel — Aborts the position entry.