Every shape that is created in TAD; has a set of corners. For e.g. a square shape would have 4 corners. (Vertices if you want to use a mathematical terminology)
In some cases, you may want to refer to the correct corner of a shape – for doing some calculation programmatically via ARDELA ,for example. You can retrieve these indices if you want.
Go to the main program Settings of TAD; and switch on “Show current object name” checkbox. The name of the current object would be shown next to the current position of the first helper; along with the index no of that corner. When you shift the helpers to another location; the index number of that corner would now be shown. You can note those down, in order to make a more nuanced ARDELA script and other uses.
The use of corner indices is reserved for a future extension of TAD
Press F1 inside the application to read context-sensitive help directly in the application itself