Ableton's Delay device packs four quick utility controls worth knowing cold. The Sync button toggles repeat timing between tempo-locked 16th notes and raw millisecond values, useful when you want delays that either lock to the groove or run independent of tempo changes.
Turning off Link separates the left and right channels, so each can run its own delay time. This is what creates that wider, more textured stereo bounce instead of a mono-feeling repeat.
Freeze grabs whatever is currently sitting in the effects buffer and loops it indefinitely, ignoring new input until you switch it off. It's a fast way to capture a moment of audio and turn it into a sustained, evolving loop on the fly.
The Filter section shapes the tone of the repeats themselves, cutting highs or lows so echoes sit further back in the mix or lose their harshness over time, rather than repeating with the same full-frequency content as the source.