2011

Straighten
Saves the location of the marked vertex while you move the X marker to any
other vertex.
If you want to remove an arc segment that connects two straight segments of
a polyline and then extend the straight segments until they intersect, use the
FILLET command with a fillet radius of 0.
Next Moves the X marker to the next vertex.
Previous Moves the X marker to the previous vertex.
Go Deletes any segments and vertices between the two vertices you select,
replaces them with single straight line segments, and returns to Edit Vertex
mode. If you specify only one vertex by entering go without moving the X
marker, the segment following that vertex is straightened if it is an arc.
Exit Exits Straighten and returns to Edit Vertex mode.
Tangent
Attaches a tangent direction to the marked vertex for use later in curve fitting.
Width
Changes the starting and ending widths for the segment that immediately
follows the marked vertex.
You must regenerate the polyline to display the new width.
2D Polyline Selection (PEDIT) | 773