Folding Elements: -oxy-foldable / -oxy-folded / -oxy-not-foldable-child
Used to configure whether or not the content of an element can be expanded or collapsed.
 Toggle Fold Toggle Fold
- Toggles the state of the current fold.
 Collapse Other
              Folds Collapse Other
              Folds
- Folds all the elements except the current element.
 Collapse Child
              Folds Collapse Child
              Folds
- Folds the elements indented with one level inside the current element.
 Expand Child
              Folds Expand Child
              Folds
- Unfolds all child elements of the currently selected element.
 Expand
              All Expand
              All
- Unfolds all elements in the current document.
-oxy-foldable Property
      
      This property defines whether or not the content for an element can be
          folded by the user. To define that an element's content can be
          folded, use the -oxy-foldable:true property.
-oxy-folded Property
      
      -oxy-foldable property and it defines the elements that are
          folded by default. To define an element to be folded by default,
        use the -oxy-folded:true property.-oxy-folded property works in conjunction with the
            -oxy-foldable property, the -oxy-folded property is
          ignored if the -oxy-foldable property is not set on the same
          element.-oxy-not-foldable-child Property
      
      When collapsing an element, it is useful to keep some of its content
        visible (for example, a short description of the collapsed region). The
          -oxy-not-foldable-child property is used to identify the child element
        that is kept visible. As its value, it accepts an element name or a list of comma-separated
        element names. The first occurrence of each child element specified in the list of element
        names will be identified as the not-foldable child and displayed. If the
        element is marked as foldable (-oxy-foldable:true;) but it
        does not have the -oxy-not-foldable-child property or none of the specified
          non-foldable children exist, then the element is still foldable.
        In this case, the element kept visible when folded will be the
          before pseudo-element.
Example: Folding DocBook Elements
<title> child element and are considered to
      be logical sections. You mark them as being foldable leaving the
      <title> element
      visible.set,
book,
part,
reference,
chapter,
preface,
article,
sect1,
sect2,
sect3,
sect4,
section,
appendix,
figure,
example,
table {
    -oxy-foldable:true;
    -oxy-not-foldable-child: title;
}foldable, folded, and
        not-foldable-child properties are deprecated and the equivalent with the
        -oxy prefix should be used instead.