Is it possible to expand whole tree

[CroBanana]

Hello. its not rly a issue, am just wondering if its possible to expand the whole tree at the start?
When i load it, without pressing all the buttons to expand it.

(hope i didnt miss it)

[CroBanana]

Well i guess you can by setting the :collapsable to false

But then there is no possibillity to collapse parts of the tree

Or am i mistaken?