* **About deleting segments of PCB Tracks.** Whilst drawing a PCB Track, it is possible to remove segments (back to one or two segments joining the start and the current end points) by pressing the `DEL` key. Note that at present (140628): once the Track is completed - by right clicking - it is no longer possible to delete individual segments. Reselecting a Track and pressing the DEL key will delete the whole Track. * **About the little green circles / discs / dots on PCB Tracks.** When a Track is selected, the little green circles that appear are end or corner points. You can grab and move them to adjust the wire. It is also possible to move a segment between the green circles by selecting the Track and then left-clicking on the segment and moving the mouse. As the segment is moved, new corner circles are added automatically as required.