Collapsible Sections

Capture collapsible sections using @specific-use attribute on the relevant <sec> element.
The value of the @specific-use attribute must be set to collapsible.
The <sec> element must contain a child <title> element for the section.
Collapsible sections are only supported for second level headings therefore they must be a child of another <sec>.
Example

<sec>
  <title>Article Requirements</title>
  <sec specific-use="collapsible">
    <title>
    <italic>Environmental Research Letters</italic> (ERL)</title>
    <p>ERL is a high-impact Letters journal, intended to be the meeting place of
  research and policy communities concerned with environmental change and
  management. Articles should be focused on the impact and significance of
  results and be of interest and accessible to researchers working in other
  fields, appealing to the broad and multi-disciplinary readership.</p>
    <p>Visit ERL’s <ext-link ext-link-type="uri" xlink:href="https://publishingsupport.iopscience.iop.org/journals/environmental-research-letters/about-environmental-research-letters/#scope" xlink:type="simple">scope page</ext-link> for details on article
  requirements and suitability.</p>
  </sec>
  <sec specific-use="collapsible">
    <title>
    <italic>Environmental Research: Infrastructure and
  Sustainability</italic> (ERIS)</title>
    <p>ERIS is a unique outlet for the publication of multidisciplinary work on all
  facets of infrastructure, sustainability and resilience in their broadest
  sense, not just environmental assessment and protection but also economic and
  social factors. </p>
    <p>Visit ERIS’s <ext-link ext-link-type="uri" xlink:href="https://publishingsupport.iopscience.iop.org/journals/environmental-research-infrastructure-sustainability/about-environmental-research-infrastructure-sustainability/#scope" xlink:type="simple">scope page</ext-link> for details on article
  requirements and suitability.</p>
  </sec>              
  <sec specific-use="collapsible">
    <title>
    <italic>Environmental Research: Climate</italic> (ERCL)</title>
    <p>ERCL is a dedicated outlet for research addressing the causes, consequences and
  solutions of climate change and natural climate variability.</p>
    <p>Visit ERCL’s <ext-link ext-link-type="uri" xlink:href="https://publishingsupport.iopscience.iop.org/journals/environmental-research-climate/about-environmental-research-climate/#scope" xlink:type="simple">scope page</ext-link> for details on article
  requirements and suitability.</p>
  </sec>
  <sec specific-use="collapsible">
    <title>
    <italic>Environmental Research: Ecology</italic> (ERE)</title>
    <p>ERE is devoted to addressing important global challenges at the interface of
  environmental science, large scale ecology, biodiversity and conservation in a
  way that bridges scientific progress and assessment with efforts relating to
  impacts of global change, resilience, mitigation and adaptation in the broadest
  sense. </p>
    <p>Visit ERE’s <ext-link ext-link-type="uri" xlink:href="https://publishingsupport.iopscience.iop.org/journals/environmental-research-ecology/about-environmental-research-ecology/#scope" xlink:type="simple">scope page</ext-link> for details on article
  requirements and suitability. </p>
  </sec>
  <sec specific-use="collapsible">
    <title>
    <italic>Environmental Research: Health</italic> (ERH)</title>
    <p>ERH is devoted to addressing important global challenges at the interface of
  the environment and public health in a way that bridges scientific progress and
  assessment with efforts relating to impact/future risks, resilience,
  mitigation, adaptation, security and solutions in the broadest sense. </p>
    <p>Visit ERH’s <ext-link ext-link-type="uri" xlink:href="https://publishingsupport.iopscience.iop.org/journals/environmental-research-health/about-environmental-research-health/#scope" xlink:type="simple">scope page</ext-link> for details on article
  requirements and suitability. </p>
  </sec>
  <sec specific-use="collapsible">
    <title>
    <italic>Environmental Research Communications</italic> (ERC) </title>
    <p>ERC welcomes all types of environment-related research, including
  disciplinary/interdisciplinary work, regional and local case studies,
  negative/null results and replication studies. The journal does not make a
  subjective assessment on the potential future significance and impact of a
  paper, instead it provides a platform for rapidly communicating research that
  meets high standards of scientific validity and rigour. </p>
    <p>Visit ERC’s <ext-link ext-link-type="uri" xlink:href="https://publishingsupport.iopscience.iop.org/journals/environmental-research-communications/about-environmental-research-communications/#scope" xlink:type="simple">scope page</ext-link> for details on article
  requirements and suitability.</p>
  </sec>
  <p>If an article submitted to one journal is found to be unsuitable for
consideration, but suitable for the other, the assessing Editor will offer the
author an opportunity to transfer their article. This means that duplication of
peer review effort can be largely eliminated as a service to our authors. </p>
</sec>