* Small improvements to the settings of the syntax highlighting.

* Lexers for several new languages have been added (Markdown, Nim, Plain text, YAML). * More advanced options for closing files have been added to the editor notebook context menu (close to the right/left). Some options are no longer duplicated in the editor and editor notebook context menus. * The context menu has been trimmed down and organized in a better way. * There is an option to disable the save-to-temp-and-move operation we use by default. * Non-latin keys now work when used as shortcuts in the editor on Linux. * Support for fonts with ligatures on all platforms has been introduced.

* A major flickering bug has been fixed when using wxGTK. Now it is possible to paste when multiple selections are active. * This release introduces some improvements to handling multiple selection. * The Scintilla component has been updated to version 3.7.5 and most of the code has been synchronized with the code for wxSTC. Per-monitor support is not yet available. * Code::Blocks is marked as DPI-aware:True on Windows which makes it look sharp. * The icons in the auto-completion popup change size to match the scaling of the text. * The icons in the editor's margin change size when scaling the editor. This should work correctly on all major ports (wxMSW, wxGTK, wxCocoa) The goal is to make icons look big enough and non-blurry. * The icon size is appropriately selected based on the scaling used by the user. * This release introduces new icon sizes (16, 20, 24, 28, 32, 40, 48, 56 and 64) for almost every UI element (menus, toolbars, project tree, most plugins). You can read a full changelog on the Code::Blocks homepage.

This is just an excerpt of the changelog with the differences since 17.12.

Codeblocks compiler setup