This option allows you to display a plan image on the screen and allow you to click on teh image to digitise irregular boundaries.
1. Open the parcel in the parcel editor.
2. Select the lines tab.
3. Enter all the lines that have dimensions
4. Click the background image button and select the background image
5. From the zoom menu select orient to image.
6. Orient the image on to the bits of the parcel which have been entered
7. Start digitizing in the missing lines.