There are several ways to magnify or reduce image areas in the TIFF Assembler Plus software.
The Zoom tool to magnify or reduce a specific point or a specific area
A specific point
To magnify the selected point, click 
and then click in the display window. To reduce the image, click , hold down the Ctrl key (Windows) or the Command key (Macintosh), and then click in the display window.
A specific area
To magnify a selected area, click , click in the display window, hold down the left mouse button, and drag the mouse over the area on which you want to zoom in. To reduce the image, click , hold down the Ctrl key (Windows) or the Command key (Macintosh), and then click in the display window. To move the area in zoom, click 
and drag the image.
The Z shortcut key to magnify or reduce a specific area
- To magnify a selected area, press and hold the Z key. For as long as the Z key is depressed, the current tool displays as a magnifying glass and you can select an area that you want to inspect more closely. When you release the Z key, the tool reverts to the previous tool used.
- To reduce the area, while holding down the Z key, also hold down the Ctrl key (Windows) or the Command key (Macintosh).
To move the area in zoom, click and drag the image.
The Navigator Palette to magnify or reduce a specific area
To zoom in via the Navigator palette, drag the rectangle over the area that you want to zoom in on, and then drag the slider up. To zoom out via the Navigator palette, drag the rectangle over the area that you want to zoom out of, and then drag the slider down.
The Zoom with scroll wheel option
If you selected Zoom with scroll wheel in Preferences > Advanced, you can also zoom in and out with any tool selected by moving the scroll wheel on the mouse. You cannot control the exact focus of the zoom, but you can always move the screen:
- Press the space bar to change the current tool into the grabber hand .
- Click the mouse button and hold it down.
- Move the mouse to move the screen area displayed into the desired area.
Zooming to a specific magnification level
You can change the display size of an image to a specific magnification level. Choose from 6%, 12%, 25%, 50%, 100% (1:1), 200%, and 400%.
- From the View menu, select Zoom, then Zoom to.
- From the list, select the level of magnification that you require.
- From the list on the toolbar, select the level of magnification that you require, or type a magnification value.
Zooming to fit all
While in Layout mode, you can change the zoom level of an image so that the entire image fills the display window. The zoom level of all elements changes to show the entire layout: on the toolbar, click Fit All 
.
Zooming to fit selection
While in Layout mode, you can change the zoom level of a selected element (a TIFF file in the layout) so that the element is displayed over the entire width or height of the display window.
- In the layout window, select an element that you want to zoom automatically to fit the display window.
- On the toolbar, click Fit Selection
.