Masking and Unmasking sub trees

In order to provide a comfortable space for users to draw their trees, we provide the possibility of masking a part of the tree as it becomes too big to work with while keeping track of all the nodes of the tree. This feature enable users to mask and unmask a sub-tree (see Figure below) from the diagram, but these elements are still existing in the model explorer and behave normally regarding other features.

      Mask and unmask a sub-tree