
But many use it to read PDFs and to add annotations to them, which aren’t particularly demanding requirements. Preview isn’t, of course, a ‘serious’ PDF editor. One obvious result is that Preview acquired its own bugs in handling PDFs, and hasn’t really recovered yet. Among the apps which had to do this was Apple’s own Preview. The new version broke a lot of existing code, and developers were forced to work around those bugs. CMD + *: Use this shortcut to change to zoom to selection.A few years ago, Apple decided to completely rewrite its support for PDFs in PDFKit and Quartz2D.Using this, you don't have to click on the menu on top each time you need an annotation tool. Shift & CMD + A: Use this shortcut to bring up the annotations toolbar.This way you can repeat the same adjustment over and over again very easily.
Shift & CMD + Z: Use this shortcut to redo the effect or adjustment you have done previously.
It is pretty useful, especially when you open a folder full of images with Preview.
Shift & CMD + F: Use this shortcut to activate the slideshow mode. CMD+ T: Use this shortcut to show fonts so that you can choose your favorite font. It helps you get away with the difficulty of having to scroll the PDF pages down to the last page. CMD + D: Use this shortcut to add bookmarks to your document so that you can come back to them later. This makes applying adjustments to documents very much easier. Alt (options key) & CMD + C: Use this shortcut to adjust color. Alt (options key) & CMD+ 0: Use this shortcut to zoom all opened images to actual size. It can be pretty useful when it comes to focusing on reading rather than editing. CMD+ B: Use this shortcut to hide the toolbar.
This helps you set the required parameters for adjustments in relation to the actual size of the document.
CMD+ R: Use this shortcut again to view the document in actual size. Alt (options key) & CMD+ B: Use this shortcut to show the image background. Alt (options key) & CMD+ T: Use this shortcut to open up the special characters panel. It is pretty useful when you keep making mistakes and need more editing. CMD+ Z: Use this shortcut to undo changes to the document or image you are working on. Use this shortcut to go to the next page of the document you are viewing inside of Preview. Option–Down Arrow: This shortcut works on the El Capitan version of Preview.