A group is a subtree with a name assigned to its root node.
The 'GROUP MODE' allows display of subtrees (groups of species)
as triangles (radial tree) or rectangles (dendrogram).
You also can convert a subtree into a group.
Click on the <GROUP> button of the 'ARB_NT' window or
the 'F3' key on the keyboard to activate the 'GROUP
MODE'. In the latter case, the cursor has to be placed
within the tree display area.
Group species:
Move the cursor to that internal node of the displayed
tree (section) which defines the subtree and click on
the left mouse button. The subtree-defining node is that
located closest to the indicated root (open square)
root of the whole tree which directly or indirectly connects
all branches of the subtree.
Ungroup species:
Press the left mouse button while the cursor is over the triangle
of a group.
Transform a subtree into a group and assign a name to it:
Proceed as described above using the right mouse
button.
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