#       main topics:
UP      arb.hlp
UP      glossary.hlp
UP      mode.hlp

#       sub topics:
SUB     rst_phys_zoom.hlp

# format described in ../help.readme


TITLE		ZOOM MODE

OCCURRENCE	ARB_NT and ARB_PARSIMONY: <PZoom> button in the left column
		F4 on the keyboard

DESCRIPTION	The 'ZOOM MODE' allows you to magnify selected square sections of
		the tree display area within the main window.

		Click on the <PZoom> button of the main window or press
			the 'F4' key on the keyboard to activate the 'ZOOM
			MODE'. In the latter case, the cursor has to be placed
			within the tree display area.

		Define and magnify a section:

			Position the cursor to define the first corner of the
			square to magnify. Keep the left mouse button pressed
			and move the cursor to define size and position of the
			region to magnify. Release the button.

		Increase/reduce the zoom scale:

			To gradually increase or reduce the zoom scale click the
                        left or right mouse button while the cursor is located within the
			tree display area of the 'ARB_NT' window.

                        Alternatively you may use CTRL+Mouse-Wheel (this works independent
                        of the currenly select mode).

NOTES		To restore the initial zoom either
                - choose the 'Physical zoom' item from the 'Tree/Reset zoom' menu of the 'ARB_NT' window or
                - press the key '0' (zero) in the tree display.

EXAMPLES	None

WARNINGS	None

BUGS		No bugs known

