| More docs on the ARB website. See also index of helppages. Last update on 24. Jun 2017 .

Main topics:

- ARB: a Short Introduction
- Glossary
- NTREE MODES (general info)

Related topics:

# SET ROOT MODE

- OCCURRENCE
- DESCRIPTION
- NOTES
- EXAMPLES
- WARNINGS
- BUGS

## OCCURRENCE

### ARB_NT and ARB_PARSIMONY: <S.ROOT> button in the left column

### F8 on keyboard

## DESCRIPTION

### The 'SET ROOT MODE' allows to position the root of the displayed tree to any of the edges.

### Click on the <S.ROOT> button to activate the 'SET ROOT MODE'.

### Set the root:

Move the cursor to any position along the desired edge and click on the left mouse button.

### Use the right mouse button to search an optimal root, minimizing the distance to the farthest leaf on each side of the root.

## NOTES

### Short descriptions of the 'MODE' and the functions assigned to the mouse buttons are given in the fourth line of the 'ARB_NT' window.

### The root is always placed to the middle of the edge.

## EXAMPLES

### None

## WARNINGS

### None

## BUGS

### No bugs known