In the TIFF Viewer Browser Extension users have a variety of options to control how TIFF images are displayed.
The following options are available on the top toolbar:
Fit to width
Scales the image to fit to the width of the viewing screen.
Fit to height
Scales the image to fit to the width of the viewing screen.
Actual Size
Displays the image without any scaling factors, using the actual size of the image.
Auto Size
Tracks the size of the browser, and automatically zooms the document to fit to the browser size.
The zoom modes described above are also available by right-clicking on the document and navigating to the Zoom option in the context menu: