Basic zoom in and out
Ctrl + + to zoom in here on the PC, or command + + on the Mac.
Ctrl – – to zoom in here on the PC, or command – -on the Mac.
Fit on Screen image
Keyboard shortcut Ctrl + 0, or command + 0 on the Mac.
Zoom all the way in to 100%
There is the command 100% under the View menu.
And also have the keyboard shortcut Ctrl + 1, or command + 1 on the Mac.
If i zoom in to 100%, i’m seeing one image pixel for every screen pixel.
If u are zooming in and then you want to switch to zoom out, press and hold the alt key here on a PC, or the option key on a Mac.
Another keyboard shortcut (control spacebar)
Select the rectangular marquee tool (or any other tool).
I can access the zoom tool by pressing control spacebar here on the PC, and clicking where i want to zoom on in.
If you want to zoom out, press control alt spacebar On a PC, and click to zoom out.
As soon you release those keys, you’ll return to the active tool, which in my case, is the rectangular marquee tool.
The keyboard shortcut on the Mac is command spacebar. (command spacebar is also taken up by the Macintosh OS’s spotlight feature. So you may find that as soon as you press command spacebar, spotlight comes up on screen. In which case press the escape key to get rid of it, and instead of pressing command spacebar, press and hold the spacebar key first, which will get you the hand tool, and then press and hold the command key, and you’ll get the zoom tool).
On a Mac press option spacebar in order to get the zoom out tool, and click to zoom out.
If I hover over the zoom tool i can see the letter Z.
Press and hold the Z key and click to zoom in.
Press and hold the Z key, and then press and hold alt or option on the Mac and click to zoom out.
As soon as I release that Z key, I return to the previously selected tool.
The downside is that if hold the Z key for too long, or I release the mouse button at the wrong time, can result in getting stuck with the zoom tool.
If you want to zoom continuously in and out from an image? There’s a bunch of different ways to work.
1. Scrubby zoom
Use your favorite shortcut, whether Control Spacebar on the PC, Spacebar Command on the Mac, or just the Z key, and then drag to the right in order to zoom in or drag to the left to zoo out.
2. Zoom in on a specific place ( turn off scrubby zoom)
When i press and hold the Z key, i will notice i have some new options that are available in the horizontal option bar, below the menu bar.
Turn off the scrubby zoom checkbox from the horizontal option bar for the moment.
Drag around the portion of the image I want, with that Z key still down so I can access the zoom tool. As soon as I release the Z key, I will zoom in on that dotted marqueed portion of the image drawn.
If I want to go back to the scrubby zoom feature, press and hold the Z key and turn on that checkbox.
Custom zoom value
In the lower left corner of the image window is the exact zoom ratio number.
I can change it by double clicking on that value to select it and entering a different value. Then press the enter key or the return key on the Mac.
Another way to adjust the zoom ratio number is to press the up arrow key to increase the value or press down arrow key to reduce the value. Then press the enter key, or the return key on the Mac, or press shift enter, or shift return, to applie the zoom level.
The best incremental zoom trick
Hover my cursor over the zoom value, in the lower left corner of the window, and then press and hold the control key, or the command key on the Mac, and I get this little scrubby cursor, which I can drag to the right in order to zoom in or you can drag to the left to zoom out and preview the effect on the fly.