“Randomly sample to test library” is to randomly import a portion of the data from the Coding library into the test library (for inter-coder reliability test). After the data import, you can go to the test library to check the imported data.
Note: To import data from a certain database to the test library, first you need to select a corresponding database, and then click [Randomly sample to test library] to import the data from the database’s coding library to the test library.