| More docs on the ARB website. See also index of helppages. Last update on 07. Sep 2018 .

Main topics:

- ARB: a Short Introduction
- Glossary
- ARB_SECEDIT - Secondary structure editor

Related topics:

- ZOOM MODE

# ARB_SECEDIT modes

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

## OCCURRENCE

### ARB_SECEDIT/mode buttons

## DESCRIPTION

    ZOOM MODE       Mode to zoom the displayed secondary structure.

See ´ZOOM MODE´ on how to zoom.

    HELIX MODE      Mode to build and destroy helix regions.

Left mouse button converts the clicked loop region into a helix region (if possible).
Right mouse button removes the clicked helix region.

    Hint: If you display SAI: HELIX it's easy to detect the helix
          regions.

### SET ROOT MODE

Left click on a loop which should be the fixpoint of your secondary structure. The root loop will not move if you create or remove helix region nor if you rotate branches of the secondary structure.
Right click onto a loop or helix to reset the angles between it and its neighbours.

### ROTATE MODE

Left click onto a helix or loop to rotate it (and its complete substructure).
Use right click to rotate w/o rotating the substructure.

### STRETCH MODE

Left click and drag a helix or loop to stretch or compress its size.
Right click to remove size constraints.

### CONSTRAINT MODE

Left click on a helix or loop and edit its size constraints manually.

### SET CURSOR MODE

Left click on a base character to set the cursor position in the primary structure editor.

### PROBE INFO MODE

Left click on

## NOTES

### None

## EXAMPLES

### None

## WARNINGS

### None

## BUGS

### No bugs known