Text Editors
The Text editor panel is where you can edit the file from the file explorer. Double clicking on the element in the file explorer opens the file in the text editor panel (opening the text editor panel if needed). The modifications in a file can be saved (independent from saving the project) with CTRL+S or on clicking on the save button in the text editor panel menu bar.
There are several text editor available. One is built-in GroIMP, the other are provided by plugins. The type of text editor can be selected in the options (the option path is /ui/options/texteditor).
Built in
GroIMP includes a built-in text editor for editing source code and text files directly within the environment. When a file—such as a script or text document—is selected from the File Explorer, it automatically opens in this editor.
jEdit
If the jEdit plugin is installed, GroIMP uses jEdit as the default text editor instead of its simple internal editor.
RSTA
The RSTA text editor is a light weight extension of the built in text editor. It adds features such as syntax highlighting, section folding, … It is faster to open that the jEdit one but hold slightly less commands. It is based (copied) on the project RSyntaxTextArea.