: Users can look up entries via five different indices: Pinyin, Zhuyin, radical, stroke number, and frequency. Digital and PDF Formats

: A PDF that has been "patched" with interactive elements, such as clickable indices or internal links that weren't in the original physical book. Software Bypass

But what does "patched" mean in this context? Is it legal? Where can you find it? And most importantly, how do you use it effectively? This article answers all those questions.