---
title: "Expression Converters and Format Masks"
slug: "expression-converters-and-format-masks"
updated: 2024-01-29T13:12:34Z
published: 2024-01-29T13:12:35Z
canonical: "kb.dataparc.com/expression-converters-and-format-masks"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://kb.dataparc.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Expression Converters and Format Masks

**Purpose:** Practice adding expression converters and format masks to controls.

**Task:** Add a tag to the canvas, add an expression converter to convert the units, then apply a mask to show one digit of precision.

**Steps:**

1. Drag and drop a tag onto the canvas. Take note of the tag’s Units, if available.

**![](https://cdn.document360.io/59db2ca4-e512-446a-a143-a7c626447812/Images/Documentation/image025_020.jpg)**
2. On the **Animation** panel, add an Expression converter.

![](https://cdn.document360.io/59db2ca4-e512-446a-a143-a7c626447812/Images/Documentation/image027_020.jpg)
3. Enter an Expression to modify the tag’s values. Use the same syntax as creating Expressions in the [Script Editor](/v1/docs/tools-script-editor). For basic math, use “IV” for the tag’s value, “+” for addition, “-” for subtraction, “*” for multiplication, and “/” for division.
4. In the Mask field, use “#” for an unforced digit and “0” for a forced digit. Enter the format mask **0.0** to force one digit after the decimal. Remember to press enter or click away.

![](https://cdn.document360.io/59db2ca4-e512-446a-a143-a7c626447812/Images/Documentation/image029_018.jpg)
5. Click **Run** to test.

![](https://cdn.document360.io/59db2ca4-e512-446a-a143-a7c626447812/Images/Documentation/image031_017.jpg)