Setting up Snap Modes enables the user to determine which points will be used as snap points when drawing in Opus. These are selected using the Snap Toolbar within Opus.
Sensitivity: The Sensitivity option determines the distance the cursor has to be from the snap point before it automatically snaps into place. Move the slider to the right to make the cursor snaps more easily.
Ortho Mode: Full: If the option is enabled, Opus will only draw lines at 0, 90, 180 or 270 degrees. Simply point the cursor in roughly the right direction and enter a value. Ortho Mode : Full can be toggled by pressing the F8 key.
Partial: The Partial mode is similar to the Ortho Mode: Full. This causes Ortho mode to apply when the cursor has snapped to a snap point.
Element Start / End: Snaps to the beginning and end of a line or other element.
Element Mid Point: Snaps to the center point on a line or other element.
Arc Center: The center of an arc or circle.
Snap to Extents: Snaps to the original point where the corner would meet, even if the corner is chamfered or filleted or the original center of the part, even if the part has been edited and the center point has changed.
Quadrant of Arc: Snaps to the four cardinal points of the compass on an arc.
Intersection Point: Snaps to the point where two elements cross.
Reference Points : Snaps to the user-defined reference points that have been inserted into the drawing.
Snap to Nearest: Snaps the cursor to the point on the element that is closest to it. This is not a commonly used snap mode.
Grid Point: Grid points can be toggled on or off by clicking on this icon.
Tangents: Snaps to the tangent of a circle or arc . This is relational to the element that is being snapped at the time.
Object Snap Tracking: Use object snap tracking to track along alignment paths that are based on object snap points. Acquired points display as a yellow square. You can acquire up to seven tracking points at a time. After you acquire a point, horizontal, vertical, or polar alignment paths relative to the point are displayed as you move the cursor over their drawing paths. For example, you can select a point along a path based on an object endpoint or midpoint or an intersection between objects.