Options
Key [O] for options (not the zero key).
After having chosen a certain mode the image of the cursor changes in most cases. You now would press the keyboard key O for "options". Options are the settings for future elements. In mode "Draw track" for example entering to the options dialog allows the adjustment of the coming track properties like layer, width, aura, etc. According to the mode the options dialog contains related elements.
Generally in TARGET 3001! first select a mode then open the "Options" dialog to do the settings for the element to come. In case the standard settings seem sufficient the options dialog can be ignored.