On the configuration screen of each Object, you can select the number of records to be created (defaults to 10), and the Locale:
Most data types allow you to configure the possible values that can be created.
For each Object & Template, you can choose a Locale which will localize certain fields when creating the mock data.
The following Data Types are generated using the Locale:
Masks are used to generate custom formats for mock values. Masks can be a combination of hard-coded values, random
You can configure the format of the telephone fields to be created, or leave it blank to be generated in the locale format:
The Identifier data type should be used to generate External Ids, or other unique string values:
Date and time fields can be limited to certain year values:
Numeric values can be limited to certain ranges, as well as specifying the number of digits after the decimal:
Picklist values are read, and applied automatically for you when generating the seeding template. These can also be restricted on the configure screen: