Motorola 507AFDMTB Manual page 16

There are three glass shelves in the refrigerator chamber.
They can be adjusted to various heights as needed.
When you remove the shelves, gently pull them forward until
the shelf comes clear of the shelf guides.
When you return the shelves, make sure there is no obstacle
behind and gently push the shelf back into the position.
Crispers
The crisper, mounted on telescopic extension slides, is for
storing vegetables and fruits.
Crisper Cover
It is for avoiding the vegetables from losing moisture. You can
adjust the humidity inside the crispers by using the sliding
block.
Crisper and Humidity Control
The humidity control adjusts the airflow in the crisper; higher
airflow results in lower humidity. Slide the humidity control to
the right in order to increase humidity.
High humidity settings are recommended for vegetables, while