Highlighter 2 is a fully redesigned evolution of Highlighter, a full app for reading and adding annotations to PDF documents.
With Highlighter 2 you can browse and annotate multiple documents at once. Documents are organized in a znotebook and they can be detached as independent windows so that you can look at, compare, and annotate two documents at the same time.
Here is a preview
Highlighter requires the new tclMuPdf-2.x package. Choose the one for your platform and install the package as a subdirectory of one of the directories given by the auto_path variable (e.g. c:\tcl\lib)
Then download the Highligther app. Unzip it and install it under any directory.
Double click on .../Highlighter-2.0/main.tcl or launch it from a shell
wish .../Highlighter-2.0/main.tcl mydoc.pdf