View

Attitude

Geometria employs a fixed right-hand reference system. The Z axis of the reference system is parallel to the vertical edge of the screen. No knowledge of the reference system is necessary to manipulate figures, create and solve problems.

At any given time, the figure has a certain attitude. The attitude can be described in terms of angles the figure forms with the reference system. When a figure is created, it has the default attitude. The figure's attitude changes as the figure is rotated.

To revert a figure to the initial attitude, select Initial Attitude from the View menu or right click and select Initial Attitude from the popup menu.

When a figure is saved, its current attitude becomes its initial attitude. To revert to the attitude the figure had when it was created, before any subsequent rotations, select Default Attitude from the View menu.

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Rotate Figure

Toggle the selector off and stroke a figure with the mouse to rotate the figure. The rotation speed and angle will depend on the stroke.

To pin a rotating figure, click on it.

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Select Elements

Toggle Selector

Right click on a figure and select Toggle Selector from the popup menu. Alternatively, click the selector button on the tool bar.

When the selector is on (white selector icon), elements can be selected by clicking on them. When the selector is off (dimmed selector icon), dragging the mouse will rotate the figure.

The selector is off by default.

Select Elements One By One

Click an element, such as a point, a segment or a face, to select (highlight) it. To select more than one element, hold down the Ctrl key. Faces can only be selected in non-transparent view mode.

Click on an empty space inside a figure to clear the selection. Hold down the Ctrl key and click on a selected element to clear that element alone.

Select All Elements

To select all points and segments in a figure (with the exception of vertices and edges), select Select All from the Edit menu. This action offers a convenient way to erase all elements at once.

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View Modes

Toggle Transparency

To toggle the view mode of a figure between transparent and opaque, select Toggle Transparency from the View menu. Alternatively, click the button on the tool bar.

In a transparent figure, visible segments are solid, whereas invisible segments are dashed. Any point or segment can be selected, whether it is visible or not. Faces can only be selected in an opaque figure.

In an opaque figure, invisible segments and points are not shown. Points, segments and faces can be selected only if they are visible.

Set Color

To change the color of an opaque figure, select Set Color from the View menu or click the color selector button on the tool bar. Select a color in the popup dialog and click OK.

Toggle Labels

To show or hide point labels, select Toggle Labels from the View menu. Alternatively, click the button on the tool bar. Labels will only show in transparent figures.

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Zoom Figure

To zoom in on a figure, select Zoom In from the View menu or click the button on the tool bar.

To zoom out, select Zoom Out from the View menu or click the button on the tool bar.

To resize a figure so it fits into the window, select Fit To View from the View menu or click the button on the tool bar.

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