DFIELD5 and
PPLANE5 is to choose 'Zoom in' from the Edit menu on the
Display Window, and
then to outline the new display rectangle by clicking and dragging the
mouse. There is a new option here. If the user simply clicks on a point (after choosing 'Zoom in'), a new rectangle will be chosen with that point at the center. The new rectangle will either be the largest rectangle with that center which fits into the old rectangle, or it will be half the size of the old rectangle, whichever is smaller.
In PPLANE5 there is a completely new zooming option which
is called 'Zoom in square'. This method of zooming keeps the units in
the abscissa and the ordinate axes scaled the same. This option is
especially useful with the new linearization
feature. The basic operation of this option is precisely the same
as the old 'Zoom in' option --- after choosing 'Zoom in square' from
the Edit menu, either click and drag or click at a center.
However, there are now ways to bypass the use of the menu by properly chosen mouse actions. These are dependent on the operating system, and more to the point, on the number of buttons on the mouse being used. The options are best presented in a couple of tables.
First the mouse actions in DFIELD5.
DFIELD5 action |
PC-Windows | Macintosh | UNIX |
| Compute and plot an orbit | Click the left mouse button on an initial point | Click the mouse button on a point | Click the left mouse button on a point |
| Choose a new display rectangle centered at a point | Click the right mouse button at the point or control-click the left mouse button at the point |
Option-click the mouse button at the point | Click the right mouse button at the point or control-click the left mouse button at the point |
| Choose a new display rectangle | Click and drag the right mouse button or control-click and drag the left mouse button |
Option-click and drag the mouse button | Click and drag the right mouse button or control-click and drag the left mouse button |
Finally the mouse actions in PPLANE5.
PPLANE5 action |
PC-Windows | Macintosh | UNIX |
| Compute and plot an orbit | Click the left mouse button on an initial point | Click the mouse button on a point | Click the left mouse button on a point |
| Choose a new display rectangle centered at a point | Click the right mouse button at the point or control-click the left mouse button at the point |
Option-click the mouse button at the point | Click the right mouse button at the point or control-click the left mouse button at the point |
| Choose a new display rectangle | Click and drag the right mouse button or control-click and drag the left mouse button |
Option-click and drag the mouse button | Click and drag the right mouse button or control-click and drag the left mouse button |
| Choose a new 'squared' display rectangle centered at a point | Shift-click the left mouse button at the point or click both the right and the left mouse button at the point |
Shift-click the mouse button at the point | Click the middle mouse button at the point or shift-click the left mouse button at the point |
| Choose a new 'squared' display rectangle | Shift-click and drag the left mouse button or click and drag with both the right and the left mouse button |
Shift-click and drag the mouse button | Click and drag the middle mouse button or shift-click and drag the left mouse button |