• Version 1.6

• Release date: February 16, 2023

Added the following features

• Automatic detection of unchanged pages
• Thermographic view

• Version 1.5

• Release date: January 05, 2022

Added the following features

• Zooming by Ctrl key + Mouse wheel
• Added dialog that leads to release notes (this page)

• Version 1.4

• Release date: November 18, 2021

Added the following features

• Export the overlapped view to PDF

• Version 1.3

• Release date: September 14, 2021

Added the following features

• Select contrast (on the overlapped view)

• Version 1.2

• Release date: April 7, 2020

The following has changed.

• Added blink view
• Fixed a minor bug.

• Version 1.1

• Release date: January 8, 2020

The following has changed.

• PDF selection dialog has been merged into the main window.
  This allows user to access the help menu at any time.

• Version 1.0

• Release date: October 25, 2019

The main functions are as follows.

• Display two PDFs side by side
• Display two PDFs overlapping
• Zoom in / out
• Display thumbnail list of both PDF pages
• Add "Marking" function
• Add "Masking" function
• Minor corrections of zoom in & out
• Monthly subscription (Include free trial period)