Working in the ST Editor
The ST editor is the central working environment in CODESYS 4 for writing and editing source code. It provides a familiar, convenient editing environment and is extended with IEC 61131-3 specific language functions. Its key functions include the following:
Autocomplete: Automatic code completion, suggestions, member lists, and parameter information
Validation: Direct display of syntax errors and warnings while typing
Go to definition: Quick jump to the definition of functions or variables
Multi-cursor: Simultaneous editing in multiple locations
Shortcuts: Full set of keyboard shortcuts
For more information about the shortcuts of the editor, see the following: Generic text editor
Search and Replace: Hit highlighting, search history, and regular expression support
Syntax highlighting: Color highlighting of language elements such as keywords, operators, identifiers, comments, and literals
Theming: Support for predefined themes (light, dark)
Code folding: Collapsible code blocks (such as functions or loops) for a better overview. Fixed scroll bar (sticky scroll) for orientation in nested blocks
Minimap: A visual overview of all code on the right side of the screen for quick navigation
Text indentation: Configurable indentation (spaces, tabs) with auto-detection
Customization: Comprehensive customization capability in the settings of the Preferences editor
For more information about the settings of the editor, see the following: Preferences