Use of mouse and keyboard
Usage of the mouse conforms to the standard rule : left mouse button is used
to select or drag an object, right mouse button - to set its properties.
Mouse cursor shape depends on current mouse operations available. If the cursor
shows two rectangles in the cursorís lower right corner, each corresponding to
a mouse button, a filled rectangle designates active state of a button,
i.e. if the right rectangle is filled, it means that the right mouse button
can be pressed to perform an operation.
This shape of cursor implies that there is no special object under cursor. Start dragging the mouse cursor with the left mouse button pressed to select a chart area to fill the screen.
Such shape of cursor says that the object under cursor may be dragged and both mouse buttons are active. For example, if this object is a ship, you can drag it with the left mouse button pressed, or set its properties by a right-click.
This shape of cursor suggests the user to click the right mouse button to set object properties but not to move it.
Such cursor appears when you press keyboard [CTRL] key. It marks starting range/bearing measurement operation. If you drag the mouse cursor from this point, the varying range/bearing circle and line will display range and bearing values to the current mouse cursor position.
The [SHIFT] keyboard key is used to pan the chart after the mouse cursor. Such cursor shape marks the beginning of this operation. Start dragging the mouse to pan the chart.
Mouse wheel is used to zoom in/out the chart.
Scrollbars of the window can also be used to pan the chart.
The most common use of keyboard is to hit its [+] and [-] keys to zoom the chart in and out.