Zoom Tools - GPS TrackMaker Reference Manual

8.4 Zoom Tools

Zoom tools allow to approach or move away from the image view. The more distant the view, the more area you
will be able to see on screen. As you zoom in closer to the image, the precision for creating, editing and deleting
data increases. The GPS TrackMaker® program features several Zoom types:
General Zoom
Zoom in function : This function is accessible through the button
located in the toolbar. When pressing
this button the center of the screen will approach. The same result can be obtained pressing F2.
Zoom out Function : This function is accessible through the button
in the toolbar. When pressing this
button the center of the screen will move away. The same result can be obtained pressing F3.
Limited Zoom
Zoom can be limited only to a portion of the screen. For that, press the Magnify on the toolbar. Then,
drag the mouse with the left button pressed. A rectangle will be formed between the initial and final points,
indicating the new limits of the screen.
The button can also be activated through F5 shortcut key.
General View
The General View button is located on the toolbar. When pressing it, the User will have a general view of the
data on the screen. If there is no data, the program will redraw the screen to the coordinates that allow a view of
the American and European continents.
The General View button can also be activated through the F4 shortcut key.
Warning: Zoom over the background image is limited by the following parameters: Zoom in is allowed up to a
minimal surface corresponding to 1.6% of the original size. Below this value, the image won't be shown on screen.
In the Zoom out , the map will be represented by a small gray rectangle if the image surface is under 1.6 % of the
screen area.
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