Field help (ITWDEFLOC) 

This grid is used to specify, by location category:

If the setup at products-warehouse level is not specified, the setup defined at products-sites level is applied instead.
SEEINFO It is possible to use by default the wild card character '*' or '?' to avoid having to specify some characters for the location code or the location type code. The search will then concern all the locations/location types which ave the same root or masked characters.