You can use the Navigator
panel in either the Library module or the Develop module to set
the level of magnification for an image in Loupe view. Lightroom
saves the last level you used and lets you switch between that and
the current level when you click in the photo with the pointer.
You can also toggle between four levels using the Zoom In and Zoom
Out commands.
The settings remain in effect until you select
a different zoom level in the Navigator panel or choose a new command
from the View menu.
Note: When two images are in Compare View
in the Library module, setting a zoom level in the Navigator or
choosing a zoom command automatically displays the selected image
in Loupe View.
To switch between the two zoom levels
set in the Navigator panel, click the photo with the pointer or
press the spacebar. The pointer changes to the Zoom tool whenever
it is still possible to zoom in.
To switch between four zoom levels, press Ctrl-+ or -
(Windows) or Command + or - (Mac OS). If you choose a Zoom
command from the View menu, the level switches between the four
settings in the Navigator panel (FIT, FILL, 1:1, and the option
chosen from the menu).
To zoom the photo to the center of
the screen, select Zoom Clicked Point To Center in the Interface
Preferences.
When the photo is zoomed and parts are not visible,
use the Hand tool on the photo or the pointer on the Navigator panel
to move hidden areas into view. The Navigator panel always displays
the entire image with a frame overlay to represent the edges of
the main view.
Note: Panning is synchronized in the Before and
After view in the Develop module.
Drag the Hand tool in the Loupe view
to move the image.
Drag the pointer in the Navigator panel to move the image
in Loupe view.
Click the pointer in the Navigator panel to move the
image to that location in Loupe view.