• Menu.ErrorReport
• ActionScript.SetProperty.String
• Menu.PushOrReloadMenu
• Math.ToString

• Menu.ErrorMessage
• Palette.MasterFadeTime

showmessages.xml

<?xml version="1.0" encoding="utf-8"?>
<avolites.macros>
 
  <macro id="Avolites.Macros.Hello" name="Hello Macro">
    <sequence>
      <step>Menu.ErrorReport('Error.Generic', "Welcome to the world of macros!")</step>
    </sequence>
  </macro>
 
  <macro id="Avolites.Macros.2lineerror" name="Another error">
    <sequence>
      <step>ActionScript.SetProperty.String("Menu.ErrorMessage", 
             "This is another message. " + "This is some more text.")</step>
      <step>Menu.PushOrReloadMenu("Error.Generic")</step>
    </sequence>
  </macro>
 
  <macro id="Avolites.Macros.showfadetime" name="Show Fade Time">
    <sequence>
      <step>ActionScript.SetProperty.String("Menu.ErrorMessage", 
             "The master fade time is currently " + Math.ToString(Palette.MasterFadeTime) + " seconds")</step>
      <step>Menu.PushOrReloadMenu("Error.Generic")</step>
    </sequence>
  </macro>
 
</avolites.macros>

This explains the functional steps within the sequence. For all the other XML details please refer to Formats and syntax

The first example just throws a message and prompts to click OK:

The seond example displays another message, here composed of two parts, and stored in a property.

The third example shows how a numeric value (Palette.MasterFadeTime) can be displayed after converting it to a string:

See make this macro available

However, this is more an example of how you can throw in some lines into your macros to show a message.