You can loosen/tighten the poles at each of the joints by turning them clockwise/counterclockwise. This will help lock/unlock them into position when they are slid out. Hope this is what you are referring to.
Twisting will tighten / loosen them (like a shower curtain rod), but on our 2017, I noticed that the middle section has a slight bend to it - just enough to make it hard to extend and retract.