There was just a good set of shortcuts. The down side to this is, as you saw, it always zooms on whatever is centered on screen at the time. Let us say we wanted to zoom up on a logo up here on the upper right hand side. Pressing command and + will not do that, it is going to continue to do it around the center point.
So, what we need for this is a tool and we have two options for that. We come over here to the Tool palette on the left hand side. You can see we have the standard Adobe Zoom Tool. Now, that is available by pressing Z Key if you want to access the tool and keep the tool selected. I usually stray away from that option because you can access it with the keyboard shortcut, but it is different and as soon as you let go of that keyboard shortcut, you will be back from whichever tool you previously has selected.
So the shortcut for doing this is very easy, it is simply to hold down the command key or the control on the PC and the space bar and you see the cursor changes immediately to the magnifying tool.
Now, this works in two separate ways as well. If we have same position it on this particular image on the upper left hand side and somewhere on the center that I just clicked, you will see that blows this up to 200% the next preview size we have available and also recenters the page. So it keeps our cursor up here everything shifts down.
So, in order to keep zooming on this you have to move the cursor around, click it back on the center here, click it back a little bit more and sometimes I can take quite a while to get you exactly where you want to be.
So, let us do a quick thing. Let us press command and 0 to go back to fit in window. Once again, command and space bar or control and space bar on the PC to activate the magnifying tool and this time, the precursor on the upper left hand side of the image, I could click and drag with it, to draw a marquee area that covers the size that you want to preview. As soon as you let go, that entire section is blown up as big as possible to fit your screen, in this case, nearly 700%. So, this is a very quick way to focus on one specific part of the page.
Now, to zoom down on this maybe you just went a little too far, you can hold down those same two keys, command and space bar, but also add the option key or the alt key on the PC and occurs the changes to the minus tool. This allows us then to click, just one click at a time, move that cursor around and continue to magnify down on the image until we get it to the size that we want it to be.