Use the slider to open and close the collapsible umbrella.[more]
The little red arrow points to the trigger that has to be pushed on a real umbrella, but here using the slider does that for you.[less]
The closing happens in two phases:
First the lateral parts are collapsed; then the three parts of the central shaft glide into each other.
The measurements of the parts were taken from a real umbrella.
You can use the zoom to enlarge details.