"Replication Oplog Window has gone below 1 hours"

I'm working with MongoDB Atlas and I have a 3 node M30 cluster with 100GB of storage. My current use case is the following: - A user dispatches one search in my platform - The platform dispatches this search to other providers (12) - I get like 2k documents per provider for this search I want to make sure I understand the "Replication Oplog Window has gone below 1 hours" alert I'm seeing. If I've got this correct, the OpLog Window is how long the master node can continue receiving data before the slave nodes get out of sync. How can I tune the setting for the size of the OpLog Window?