Your TYPO3-integrator has to setup the frontend-editing for an Organiser table like calendar items.
If there is a running frontend-editing, you can configure the properties of the used frontend-editing-fields.
For example: you can hide a field and you can add a new field among others.
If you like to add a new field, you have to respect some conventions.
Please refer to a form-field with similar properties, to understand these conventions.
Sorry, that there isn’t any more detailed documentation yet.