By default, the input focus is kept in the ContentMap when you navigate it and you can't enter text in the Editing Window.
The input focus can be switched the following ways:
Switch the input focus manually.
To explicitly move the input focus from the ContentMap to the Editing Window, press F3.
To move the input focus back from the Editing Window to the ContentMap, press F2.
Enable automatic input focus shift.
To enable automatic input focus shift from the
ContentMap to the
Editing Window, click the button at the top of the
ContentMap pane.
After that, when you click some element in the ContentMap, the input focus will be automatically set to the Editing Window so that you can enter text there.
The cursor position may not be present in the Editing Window in the case of a stylesheet bug. In this case, the real position is shown in the status bar and the blinking cursor disappears. This allows you to author the document as usual, though.