The Jenkins terminology update has selected "controller" as the replacement for the term "master". The "Agent to master access control" that is available from "Manage Jenkins" > "Configure Global Security" should be updated to use the new terminology.

Screenshots should be replaced in the online documentation as well.

Refer also to the documentation pull request that migrates the detailed documentation from the wiki to www.jenkins.io . That pull request originated from GitHub issue 3222 and from WEBSITE-457.