To enable expandable drop-down sections in the HTML output from your DITA document:
[DropDowns]
; UseDropDowns = No (default) or Yes (enable use of dropdowns)
UseDropDowns = Yes
To provide simple drop-down sections:
For example, suppose you apply @outputclass="ExpandThis" to each paragraph to be expanded. You would include the following setting in your project configuration file:
[HTMLParaStyles]
ExpandThis = DropDown
With this setting, DITA2Go would insert a drop-down link in HTML output just before each ExpandThis paragraph, and hide the paragraph when a user first displays the topic. The user clicks the link to show the paragraph; then clicks the link again (or clicks the paragraph) to hide it again.
To include multiple paragraphs in an expandable section, or to include material in some other format, surround the material to be expanded with Code PI markers in otherwise empty paragraphs; see §16.9.3 Delimiting expandable drop-down sections.
To position drop-down links yourself, or to use existing text in your document for the links, or both: