| More docs on the ARB website. See also index of helppages. Last update on 27. Jun 2017 .

Main topics:

- ARB: a Short Introduction
- Glossary
- How to start ARB_EDIT4
- Helix

Related topics:

- ARB_EDIT4 Options
- Toggle secondary info for SAI

# Define Helix Symbols

- OCCURRENCE
- DESCRIPTION
- Configuration
- NOTES
- Missing
- EXAMPLES
- WARNINGS
- BUGS

## OCCURRENCE

### ARB_EDIT4/Properties/Helix settings

## DESCRIPTION

### Different base pairs in helix regions can be indicated by user-definable symbols. This window allows you to change the mapping between base pairs and displayed symbols.

## Configuration

### Show helix: Toggle display of helix symbols

### Pair definitions. Each line contains two textfields:

The left textfield contains one or more base-pairs. Each base pair contains two characters (bases, gaps-characters, ...). Base-pairs are separated by spaces (' ').
The right textfield contains the helix symbol used for each of the specified pairs.

## NOTES

- Pairs are not case-sensitive
- If a pair is not defined in any line, the symbol given behind 'Default' is used.

## Missing

### @@@ description of Non_Standard pairs ...

## EXAMPLES

### None

## WARNINGS

### None

## BUGS

### No bugs known