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The displayed elements can
now be interactively manipulated in other ways. We may elect for example
to move an element to a new position or modify its size. To move the
element, first select it, then, holding down the left mouse button, move
it by dragging the mouse to the new location. The element can be
stretched (i.e. made bigger or smaller in size) by clicking and holding
down the left mouse button at any of its handles and dragging it. All
types of components, with the exception of probes, can be stretched this
way. A probe cannot be stretched. Try out a few of these actions on the
displayed elements to see their effects.
The system-display toolbar (Fig.
7) can be used to further interact with the displayed design.
Pressing the Undo
button reverses the last geometric change made to any of the elements.
The Redo
button re-instates the change. Press the Undo
button several times until the system is returned to its original
geometry (the Undo button becomes disabled
when this happens). Press the Lock Components
button (its icon changes from an open lock
to a closed one) in order to lock the displayed elements in place so
that their geometry can no longer be interactively changed. Pressing the
Lock Components button again unlocks the
component. We will leave the Lock Components
button in the locked state for the remainder of this tutorial. Other
possible actions on components include rotation of components, zooming
in and out of different regions of the display pane and the display of
different side views ( front , back
, top etc.) of the design. Full descriptions
of these actions are available through the online help. Clicking
anywhere in the system display pane with the right mouse button displays
a floating menu that allows among other things, the opening, saving and
printing of the current design, the selective display of design features
and the generation of updated reports about the components of the
system.
Fig. 7. Main program system-display toolbar: 1-
component lock/unlock button, 2 - zoom-full button,
3 - zoom box button, 4 - zoom-last button, 5
- zoom-out button 6 - rotate button, 7 - perspective-view
button, 8 - undo button, 9 - redo button, 10
- show-motion button; 11 - System view drop-down
list; 12 - On-display drop-down list.
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