Answer:
The RF‑CONCRETE Deflect add-on module is a module extension of RF‑CONCRETE Surfaces.
The calculation of deformations in cracked sections (state II) with RF‑CONCRETE Deflect can be activated by selecting the "Analytical method of check" in the "Serviceability Limit State" tab in RF‑CONCRETE Surfaces.
In the detail settings, you can activate the "Deflection with RF‑CONCRETE Deflect" option.
The results from the calculation with RF‑CONCRETE Deflect are then available for the respective design case in the "Serviceability Limit State" tab of the Results navigator.