Hi Frank,
The FlexZone compartment has 5 settings, which are Freeze, Soft Freeze, Meat/ Fish, Fruit/ Veggies, and Beverage. No, you cannot set the temperature exactly to 29 degrees, as the FlexZone feature has preset temperatures already.
For the FlexZone preset temperature settings, kindly refer to the link below. Please turn to page 45 (FlexZone) of the user manual.
User manual:
https://downloadcenter.samsung.com/content/UM/202509/20250925100116971/DA68-04752V_T-TYPE_RF9000D_EN_MES_CFR_250806.pdf
Have a great day!
Nicole