You can apply filters to a block of text using automation scripting in two ways.

First, you can wrap a text block in the apply tag.

• automation
• output

• start:
    return:
      output@text:
        {% apply upper %}
        All of this text will be uppercase.
        On every line.
        {% endapply %} 

• __return:
    output: |
      ALL OF THIS TEXT WILL BE UPPERCASE.
      ON EVERY LINE. 

Alternatively, you can chain multiple filters together with the pipe (|) character. This can be useful when creating snippets.

• automation
• output

• start:
    set:
      text@text:
        ALL OF THIS TEXT WILL BE LOWER CASE.
        ON EVERY LINE.
        WITH A >.
        AT THE START OF EACH LINE.
    return:
      output: {{text|lower|indent('> ')}}

• __return:
    output: |
      > all of this text will be lower case
      > on every line.
      > with a >.
      > at the start of each line.