Finding controls requires you to provide both a PCA-embedding of and allele frequencies for your cohort (no individual-level data is required).
Download the archive below and and follow the instructions in the README to prepare your data for finding controls from GLAD.
You will have the option to either automate the process with Docker or to perform the transformations in Python.

Once you have prepared your data using the preparation archive, upload the query file containing the PCA-embedding and allele frequencies.
Before submitting your job, you can select the control matching parameters.