Matthew Tompkins provides a detailed explanation of the uses of the loop expression in After Effects looking at loopOut(), loopIn(), loopInDuration(), loopOutDuration() commands and their “ping pong”, “cycle” and “continue” modes. Check out the Detailed look at Loop Expression in After Effects Tutorial here.
Matthew Tompkins notes: “A detailed explanation and demonstration of the uses of the loop expression in After Effects. Examining the loopOut(), loopIn(), loopInDuration(), loopOutDuration() commands and their “ping pong”, “cycle” and “continue” modes.”
