The 'zoom' toolbar provides tools to modify the enlargement factor of the view on the
display screen of the active document. This enlargement factor is saved for each page of
each document.
Screen shot: Zoom Toolbar
The first button centers
in on a precise point and augments the zoom by 25%. Click on the left mouse button at
the spot where you would like to center the enlargement. Click on the right mouse button
to quickly return to frame selection mode. Zoom factor is limited to a maximum of 400%.
Once the limit is reached this button is rendered ineffective. 
The second button centers
in on a precise point and reduces the zoom factor by 25%. Click on the left mouse
button at the spot where you would like to center the reduction. Click on the right mouse
button to quickly return to frame selection mode. Zoom factor is limited to a minimum of
10%. Once the limit is reached this button is rendered ineffective.
The first button enlarges
a zone on the display screen. Stretch a rectangle on the display screen to define the
zone; the shape of the rectangle being pulled remains in proportion to the dimensions of
the display screen. Before placing the source point or while stretching the rectangular
zone it is possible to cancel the zoom adjustment by clicking on the right mouse button.
The zoom factor is limited to a maximum of 400%. Once the limit is reached this button is
rendered ineffective. 
The second button
calculates the enlargement factor so that the width of the page is entirely visible on
the display screen. The page will be horizontally centered on the screen. 
The third button
calculates the enlargement factor so that the entire page is visible on the display
screen. The page will be horizontally and vertically centered on the screen. 
The last button
calculates the enlargement factor so that the page appears in its original size.
The page will be horizontally and vertically centered on the display screen. Warning!
Xclamation bases its calculations on information delivered by X server. If this
information is erroneous, the calculation will be incorrect and the page will not appear
in its true original dimensions. To verify information given by X server about the size of
the screen try the command: "$>xdpyinfo | grep dimensions".
