The ST editor is used to create programming objects in the IEC programming language Structured Text (ST) or extended Structured Text which provides some extensions to the IEC 61131-3 standard.
The ST editor is a text editor. Therefore, use the corresponding text editor settings in the Options and Customize dialog boxes to configure behavior, appearance, and menus. There you can define the default settings for highlight coloring, line numbers, tabs, indenting, and many other options.
To select blocks, press the ALT key and select the desired text area with the mouse.
The editor will be available in the lower part of a window which also includes the declaration editor in the upper part.
If syntactic errors are detected during editing, the corresponding messages will be displayed in the Precompile Messages window. This window is updated each time you reset the focus to the editor window (for example, place your cursor in another window and then back to the editor window).
