Follow the loading clearances for your model, particularly around air outlets and the rear wall. There is no single gap measurement that applies to every refrigerator interior.
What the observation tells you
The practical aim is to keep intended air paths open and allow doors and drawers to close naturally. A large flat tray can bridge a space more completely than several small containers, even when the total food quantity is similar. Avoid using the shelf area as a tightly packed cupboard.
A useful next step
Check the manual's diagram and rearrange obvious obstructions without dismantling fittings. If the cabinet seems too small for the routine load, adjust shopping or storage arrangements rather than compensating with extreme settings.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.