- Index

< Previous |  | Next >

# LVconf Type: Expression Macro

## Overview

Use the LiveView Configuration File Editor to configure the Expression Macro lvconf file type.

## Expression Macro Tab

Expression: enter a LiveView expression.

Parameters: Click Add to assign a case-sensitive parameter name and default value to each. Since parameters are fulfilled in order, if one parameter is unspecified (using the default), then all parameters after it must also be left unspecified.

Parameters can be specified for a macro. Parameters are embedded into the macro expression by prefixing them with a dollar sign (for example, $myParam). Macros are called with positional parameter specification (for example, myMacro(paramVal)).

## Source Tab

The Source tab provides a text-based XML configuration file editor, which is a validating XML editor that is aware of the schema that defines the XML syntax of LiveView configuration files. See Text-Based XML Configuration File Editor for more information.