View > Zoom > Zoom 100%
Zoom 100%
Zoom in, zoom out, zoom 100% and fit the image to the window size. At 100% zoom your image will display at its actual image size.
1. Do one of the following:
 Choose View > Zoom > Zoom 100%
 Click the Zoom 100% button on the toolbar
Related Information
View > Zoom
View > Zoom > Zoom in
View > Zoom > Zoom out
View > Zoom > Fit to window
Effects > Blur > Zoom Blur
Search the Internet