Geometry Explorer Help
Using the Edit Menu:
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The items in the edit menu enable you to make changes to the
geometric
objects and figures that are already on the canvas. The Edit items are
grouped into six categories: Undo/Redo, Cut/Paste, Clear/SelectAll,
Point Size/Pen/Fill, Properties, and
Preferences.
Undo/Redo:
Undo: Choose the "Undo" command in order to undo the effect
of the last action you performed. You may undo any creation,
construction,
move, or transformation using this item in the edit menu. Each time you
choose "Undo" another action is undone. In other words, the first time
it will undo the last action you performed, the second time it will be
the second to last, and so on until you are left with a blank canvas
again.
(Note: Animations are currently not undo-able. )
Redo: Choose the "Redo" command to undo the last "Undo"
action.
By using undo and redo one can create a geometric demonstration which
can
be "re-wound", thus showing the steps of construction.
Manage Undo/Redo: Choose
this menu to open a dialog box that will let you choose an object for
which you can undo (or redo) all constructions back to the construction
of that object.
Cut/Paste:
Cut: Choose the "Cut" command to completely remove the
selected
geometric object(s) from the canvas and place it in a memory buffer. In
order to use this item, you must first select something on the canvas.
Once you cut it, you can paste it anywhere you want on the canvas.
Note:
if the object to be cut has other objects which depend on it (e.g. a
point
may be an endpoint of a segment) then, the dependent objects will also
be cut.
Copy: Copying creates a second, identical version of the
selected
object(s) and has absolutely no effect on the original object(s). This
second version is placed into the memory buffer and can be pasted
anywhere
on the canvas as many times as you would like.
Paste: The "Paste" command pastes the contents of the
memory
buffer at a slight offset from the location of the original. You may
use
this item in the edit menu to paste into the same Explorer window.
(Note:
Pasting from one window to another is not available at this time)
Clear/SelectAll:
Clear Canvas: This will clear the current canvas of all
objects.
Select All: This menu item is used in those
situations
where one wishes to select all objects of a single type. For example
one
may wish to select all points in the Canvas. When we click on "Select
All"
a submenu will drop down with the items "Points", "Segments", "Rays",
"Lines",
"Circles", "Arcs", and "Objects" under it. By choosing one of these
options,
all items of that type will be selected. If one chooses "Objects" all
objects
of any type in the Canvas will be selected. For more information
on selecting objects in the Canvas look here.
Point Size/Pen/Fill:
Point
Size: This menu item can
be used change the size of a point. To change the point size, select a
point and set the size in the dialog box that will pop up.
Pen
Style: This menu item can
be used to change the style of the drawing pen. This can be done
for any object that is drawn with a pen stroke, for example, linear
objects, circles, arcs, and graphs. To change the pen style,
select an
object and then choose one of the options under this drop-down menu.
Fill Style: This menu item can
be used to change the painting style of the current paint brush.
This can be done for any object that is filled with a color, for
example, polygon interiors, and circle or arc interiors. To
change the fill style,
select a filled object and then choose one of the options under this
drop-down menu.
Properties:
Properties:
This menu can be used to set the properties of the currently selected
object in the canvas. Properties include visibility, labels,
color, and other attributes of geometric objects.
Manage Properties: Choose this
menu option to bring up a dialog box of all current objects. Once you
select one, the Properties dialog box will open for that object.
Preferences:
After choosing this menu item a dialog box will pop up asking if you
wish to change any preferences for the program. These preferences
include
the level of accuracy for reporting calculations, whether to show
labels
or not, and what type of canvas (Euclidean, Hyperbolic, or Elliptic)
the program
should start up with as a default. Changing any one of these
preferences
will result in a new preference file being recorded. Preferences
become
active immediately and will be the default behavior for the program the
next time the program is started up.