rotate the scene by left-dragging if you do not point at an object (or press ALT if
you do so)
zoom in and out by right-dragging .
translate the scene by left-right-dragging .
select an object by clicking on it
add an object to the selection by ctrl-clicking on it
drag a free point (rectangular shape) parallel to the screen
move an object on the near-far-plane by Shift-dragging
Meaning of mouse-cursors:
Normal cursor:
The mouse isnīt pointing at anything. You can rotate the scene.
Mirrored mousepointer:
The mouse is above an object that can be selected or
’reverse dragged’ (meaning that the object is not free and can only be dragged by
dragging the free objects it depends on).
Hand:
The mouse points at a free object that can be selected and moved.
Potential problems:
Rotating the coordinate-system is not possible:
If too many objects are on the
screen one cannot find a free space to click at. Solution: Pressing ’ALT’ disables
selection and enables rotation.
The object-tree: Here you can select and deselect objects or whole ranges. Right-clicking
gives a context-menu.
The toolbar: Choose actions that match the current selection or get popup-menus for
constructing objects.
The menu: In addition to the standard-menus for file-operations you have menus for
constructing objects, measure and calculate, macros, typical tasks and extras.
The command line: Here you can generate objects by entering commands. This is
particularily useful for solving standard-tasks in textbooks.
The small toolbar: Here you can find polymorphic commands like ’normal’, ’parallel’ and
’intersection’ as well as commands for redefining and grouping objects.
