You can transition from sketching a line to sketching a tangent arc, and vice versa, without selecting the arc tool.

To autotransition between line and arc:

  1. Click Line Tool_Line_Sketch.gif (Sketch toolbar) or click Tools > Sketch Entities > Line and sketch a line.
  2. Click the endpoint of the line, then move the pointer away.
    The preview shows another line.
  3. Move the pointer back to the endpoint, then away again.
    The preview shows a tangent arc.
  4. Click to place the arc.
  5. Move the pointer away from the arc endpoint.
    The preview shows a line. You can draw a line or change to an arc as in Step 3.
    To toggle between line and arc without returning to the endpoint, press A.