The
<regions:content /> tag defines the area in the design where the page's editable content is rendered.
Each design needs to have exactly 1 content region visible at any one time (as Pages only have 1 primary content).
Multiple can be present if they are surrounded by
<logic:if> and
<logic:else> tags to create different scenarios inside the design.
If more editable regions are required, the
<regions:contentadditional> tag can be used.