Here is a list of other features to interact with GroIMP that are cool, but not enough to get their own section.
With the plugin Autocompletors comes the possibility to use a text autocomplete in GroIMP text editors.
Text completors are selected in the options (see how to use the preference panel).
To make the completion, you press CTRL + Space. The possible completions will appear in a popup, by pressing Enter the selected completion will be inserted in the text. It is possible to use the arrows UP and DOWN when the popup is open to select other completions.
Starting with GroIMP 2.1.6 it is possible to select items from a explorer and drop them to the CodeEditor, to create a reference to this resource. For example a shader called “leaf” could be selected in the shader explorer and dragged into the text editor. After dropping it the reference shader(“leaf”) will be created.