Snap to Point

Snap to Point lets you begin or end the sketch on the points of the grid. As you are sketching, the points are snapped to the intersection points of the grid.

This option can also be set by selecting Snap to point check box from Me > Preferences > App Preferences > 3D Modeling 3D Modeling Core > Sketcher.

In the following example, the black spline is created with Snap to Point selected. All the points are on the grid. Conversely, the highlighted spline is created with Snap to Point cleared.