One question...

Theme: Track, conductor path

How can I delete the tracks being routed by the auto router?
I'd like to place some tracks manually but I had already started the auto router. How can I delete its tracks and vias?

The easiest way is to highlight all by [Ctrl]+[a] and to press the [Del] key. Deletion in TARGET works in three steps: The first tap of the [Del] key deletes only the work of the autorouter. The second tap of the [Del] key deletes the manually placed tracks too. The third tap finally deletes the highlighted components and all other drawn elements.

After any auto routing action you also might use the Undo function. Use the Backspace key or [Ctrl]+[z] or use the arrow icon (see toolbar).