Magnifying the Image
Mira Pro provides screen image magnifications in the range of 16x to 1/1024x. Magnifying changes the mapping of 1 image pixel to 1 screen pixel. All magnification values are powers of 2, so that no pixel interpolation occurs and you always see actual image pixels. For example, using a magnification of4 maps 1 image pixel into 4 screen pixels whereas using a magnification of1/8 maps 4 image pixels to 1 screen pixel. For extremely large images, using the maximum de-magnification option of1/1024 can be used to fully display an image 1 million pixels wide in a 1000 pixel screen width.
Screen magnification is purely a view effect as no changes are made to the actual pixel data. To change the image size or scale requires interpolating the image using one of several Image Geometry Commands, such as Scale Image and Affine Transformation commands.
These methods use the 
(magnify) button on the Image Bar to magnify the image at the location
of the pointer. This keeps the image centered at the location of
the mouse pointer provided the image fills the window. However, if
the image is smaller than the window, the center position will be
changed.
This method is available only when the Image Bar is open in the
Image Window. If
you hover the mouse over the button, a
tooltip will open showing the current magnification. To change the
magnification, use the procedure below:
Click on the Image Bar to enter "magnify
mode". Then:
Point the mouse at the new center of magnification. Then
To Enlarge: Click the left button.
To Shrink: Hold down the [Shift] key and click the left mouse button.
To leave magnify mode, enter another mode. For
example, click 
on the Image Bar to switch to Roam Mode in which no mouse command modes are
active.
This method requires a mouse having a thumb wheel or a mouse pad having thumb wheel emulation.
In any command mode, point the mouse at the image where you want to center the magnification or demagnification.
To Enlarge: Rotate the thumb wheel forward.
To Shrink: Rotate the thumb wheel backward.
The following methods magnify the image relative to theImage Window so that magnifying the image shifts it relative to the top left corner. In general, this changes the centering in the window.
This method is available only when the Image Bar is open in the Image Window.
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On the menu at the top of the Mira application window, click the View > Magnify command to open a menu similar to the one above..
Select the magnification from the menu.
Right click on the image to open the Image Context Menu.
Select the Magnify menu,
Select the magnification setting from the menu.
