---
url: /excel-addin/symbols.md
description: >-
  The Symbols group allows for the quick copying of key uncommon characters for
  MODLR use.
---

# Symbols

The Symbols group allows for the quick copying of key uncommon characters for MODLR use.

![Symbold](/excel-addin/excel-addin-symbols.png)

## Delta Symbol

Clicking the **Δ Delta Symbol** button will copy the `Δ` character to the clipboard to be pasted when needed.

The delta symbol does not have any direct use in the MODLR excel add-in, but has important uses in the creation of MODLR formulas. More can be learnt about the use of `Δ` [here](/technical/feeders-invalidations-and-rules.html#turning-off-a-feeder).

## Hierarchy Prefix

Clicking the **» Hierarchy Prefix** button will copy the `»`character to the clipboard to be pasted when needed. You can learn more about the use of `»` [here](/technical/direct-references.html#full-syntax).