A tentative snap point is a form of graphic input that is used to:

• Preview the location of the next data point. Accepting the tentative point location enters the data point there.
• Define a point of reference for entry of the next data point.

It is also possible to snap a tentative point to an existing element (put it directly on the element). Tentative point snapping helps you accurately construct new elements that are either connected to existing ones or precisely related to existing ones.

Using tentative snaps, for example, you can:

• Place a line from the exact end point of an existing element to the midpoint of another.
• Place a line perpendicular or parallel to another line.
• Place a circle tangent to an arc or a B-spline curve.
• Place a cell at the centroid of a shape.