June 2009
Intermediate to advanced
352 pages
10h 57m
English
PDFs are much more complex than they look. Under the hood, they’re a spaghetti-like network of things such as XObjects, Arrays, Page Tree Nodes, and Optional Content Groups. That’s why some edits can’t be undone in Acrobat (Figure 12.28). You’d break the spaghetti.

Even if you’re using some of the excellent, third-party add-ons for Acrobat to perform edits, it’s advisable to work on a copy of your file just in case things fall ...
Read now
Unlock full access