If APIDOG allows to create Masks?

Masks same as we can find in Stoplight: Mask On: Masking Now in Stoplight Platform! | Stoplight

Apidog supports hiding some keys of the schema after the endpoint references it. This way you can use different parts of the same schema on different endpoints.

Could you tell something more about that? How I can use that?

After referencing the schema, you can hide and modify the node, as shown in the figure.