The catch modes Default 2D and Default 3D are used by all 2D and 3D operations that use catch: use great care when changing these settings as the new settings will be used in subsequent operations.
You can control the catch settings, after displaying the Catch option box, by clicking the cascade button on the right-hand side:
• To be used by all 2D operations, click Default 2D.
• To be used by all 3D operations, click Default 3D.
• To be used in the next click only, click Next Catch.
For example, if you are creating a complex profile, and want to catch to points on parts and project them to the active workplane, you would use Default 2D. You need to catch several times in several operations to vertices on parts and project them to the active workplane. After creating the profile, you should reset the settings.
For example, if you are creating a complex profile, and want to catch to ONE vertex on a part for a point and project it to the active workplane, you would use Next Catch. You only need to catch to this type of element once, and then return to the default catch modes.
The default catch behavior
Creo Elements/Direct Modeling automatically sets the catch mode depending on the type of operation (2D or 3D):
• For 2D, Creo Elements/Direct Modeling catches to all geometry elements on the active workplane and projects the point onto the workplane.
• For 3D, Creo Elements/Direct Modeling catches to all geometry elements on all workplanes and parts.
The default catch mechanism (All) handles cases where there are two or more catchable elements in its catch range by using a catch priority:
1. 2D vertex closest to the center of the catch range.
2. 3D vertex closest to the center of the catch range.
3. 2D intersection closest to the center of the catch range.
4. Grid point (on the workplane) closest to the center of the catch range.
5. 2D edge closest to the center of the catch range.
6. 3D edge closest to the center of the catch range.