Doing Options → Options and clicking on Templates displays this dialog:
Any template for code generation that you create will either be for Message Loop mode or Event mode. Koda comes with one template for each mode: Loop Example and Event Example.
When you click on Loop, templates usable in Message Loop mode appear in the list; when you click on Events, templates usable in that mode appear.
When you select a template and right-click on it, a context menu appears, with the following choices:
The default template is used for generating code via Tools → Generate Form Code (or the F9 key).