releases/3.1.0.0

Created version 3.1.0.

Enhanced the auto‑comparison mode for improved usability.
Added a flash indicator when jumping to differences, and the Jump to Differences button can now be toggled to navigate to the next page.

• Default mode is now ’Compare Bookmark’, and 'Compare Book' has been renamed to 'Compare Document'.
• Added an outline flash indicator that highlights the compared area when using the Jump to Prev/Next buttons.
• Jump to Prev/Next button now supports switching between diff‑based and page‑based navigation.
• Revised UI text for better clarity and consistency.
• Added support for opening password-protected PDF files.

Full Changelog: v3.0.0...v3.1.0

releases/3.0.0.0

Created version 3.0.0.

'Compare bookmark' and 'Compare book' are now supported.
The latest version also adds an automatic comparison mode that uses bookmarks.

• Added Bookmark Comparison and Book Comparison.
• Added "Clear all markers" menu item.
• Fixed an issue where file paths and page numbers in TextBox could not be copied.
• Fixed an issue where text could not be selected correctly when rotated 90 degrees and 270 degrees.

Full Changelog: v2.6.0...v3.0.0

releases/2.6.0.0

Created version 2.6.0.

Improved bookmark and zoom operations.
Fixed flickering and other issues with zooming.

• Arranged the Next/Prev buttons of the left and right panes side by side.
• Added expand and collapse and expand current bookmark button.
• The bookmark that corresponds to the current page is now displayed as selected.
• Extended PDF display up to 900%.
• Fixed an issue where trackbar magnification was incorrect when using wheel zoom.
• Fixed various issues with zoom.

Full Changelog: v2.5.0...v2.6.0

releases/2.5.0.0

Created version 2.5.0.

Added color reduction copy mode.

• The UI has been redesigned so that it can be operated efficiently with a mouse.
• It is now possible to drop two files at once to open a PDF file.
• Fixed other issues.

Full Changelog: v2.2.0...v2.5.0

releases/2.2.0.0

Created version 2.2.0.

Added color reduction copy mode.

• If the 'Enable color reduction copy' menu is checked, the colors will be reduced to 256 when copying an image.
• Add the ability to click on a page number to change it.

releases/2.1.0.0

Created version 2.1.0.

Add the Bounds mode.

• Bounds mode can specify comparison targets for each PDF. Make a new comparison while preserving the previous result.
• Improved that the first search took a long time.
• Added ability to navigate to previous difference page.

releases/2.0.0.0

Created version 2.0.0.

Improve user interface.

• Add ability to navigate to difference page.

• Add history function in Find window.

• Add icons to find and rotate functions.

  Visual studio 2022 / .NET Framework 4.8.

releases/1.5.0.0

Created version 1.5.0.

Support the text selection.

• Added text button to copy text.
• Copy menu in the form works simultaneously on selected text and comparison image.

releases/1.4.0.0

Created version 1.4.0.

Add shortcut keys.

• arrow left and right
• Ctrl + arrow left and right
• Alt + arrow left and right
• Space

Experimental/1.3

Update PdfiumViewer fixed zoom issues.