Interaction

Main Window :

Most interactions with the data involve mouse and cursor key operations in the main window. In general, the left mouse button is clicked and dragged to control up-down (y) & left-right (x) type operations.While the mouse button is depressed, a low resolution rendering mode is used to allow interactive control. On release of the mouse button the data set is rendered properly. During this process the redraw image toolbar button turns red to indicate that the system is busy rendering. Depressing a mouse button will interrupt the rendering and return to the interactive mode.
The cursor keys allow fine x & y control when the main window has focus. Right mouse button down and drag is used to control anti-clock (z) type operations. The Home and PageUp keys provide z-axis fine control.
The type of interaction is determined by selecting an option either from the toolbar buttons or from the mode menu list.
All interactive rotations & shifts are relative to the CURRENT view.
Both buttons may be pressed in ROTATE and MOVE modes to change size.The rotational sensitivity of the mouse and cursor keys can be altered by changing the angle increment (default 1 degree) in the view control window.Holding the shift key down while pressing cursor keys multiplies the effect ten fold (e.g. default rotation 10 degrees).Holding the control key down while pressing cursor keys divides the effect ten fold (e.g. default rotation 0.1 degrees).

Toolbar Buttons :

	Rotate image (mouse & key)	F4
	Move image (mouse & key)	F5
	Crop or restore data from top, front, left (mouse & key)
	Crop or restore data from bottom, back, right (mouse & key)
	Scroll cropped region through data space (mouse & key)
	Resize image, scale is displayed (mouse & key)	F6
	Left Mouse button UP places a marker	F7
	3 Orthogonal slices (mouse & key)	F8
	temporary cull from back (mouse & key)
	3D edit mode, mark region to keep with brush	F9
	2D slice edit mode, mark region to keep with brush
	redraw image - turns red when image is being calculated
	auto repeat for rotate, move, crop,scroll,resize & cull	F3
	Rotate to initial viewpoint	F2
	Shift to initial centre of rotation

These toolbar buttons modify the effect of the mouse & cursor keys in the main window.

Extra Window :

Some buttons put up an extra menu of commands. Here, for example is the system in 3D edit mode with the edit menu to the right of the main window. This is automatically replaced by the view menu when Rotate or Move is selected. When typing in edit boxes in these windows, it is important to realise that the system needs to know when the new value typed in is complete. Tabbing to, or clicking on, another control in the window or pressing the return key will cause the new value to be used.

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