The latest iPad app from Readdle, a company famous for its excellent productivity apps for iOS, has perfected PDF annotation and note taking on a touchscreen device. It’s called Remarks, and it allows ...

A good annotation tool can make the iPad a powerful companion for any teacher and scholar, especially if combined with a stylus for writing on the screen. But a bewildering variety of apps now exist ...

When you edit PDFs online, you can add annotations like comments and make notes directly within your digital files. This improves collaboration and efficiency by allowing you to quickly share and ...

Many apps can display PDFs on an iPad; that capability is built into iOS. But only a few of them can handle annotations—such as the notes, highlighting, and other elements that you use to comment on ...