** The distance option is only available for Lines and Arcs.
Select the Break button and the command prompts:
Give Arc/Line/Ellipse/Polyline to Break:
Move the cursor to the required entity and click to select. Depending on the type of entity one or two options exist.
For all four entity types the Snap mode is available. In this mode a cross moves along the chosen entity as the cursor is moved. The cross position is calculated as a perpendicular from the cursor position to the entity. If the cross disappears then no perpendicular point exists. Click to accept the break point and the entity is broken into two.
If a Line or Arc has been picked then the Distance input option is available. here a dynamic dimension is displayed showing the distance between the nearest endpoint (at the point the entity was selected) and the perpendicular position on the entity from the cursor. If the dimension disappears then no perpendicular point exists. Click to accept the break point and the entity is broken into two.