Hi,
You mean by adding a parsys component.
please check this link:
http://blogs.adobe.com/sunil/2015/04/12/adding-the-parsys-component-to-template/
if you are using sightly them:
<div data-sly-resource="${'content' @ resourceType='wcm/foundation/components/parsys'}"></div>
if JSP then:
<cq:include path="par" resourceType="foundation/components/parsys" />
Additionally:
If you want your component to be able when you click on design mode and then adding the component through parsys.
create a blank dialog or create a node cq:EditConfig so this component will be available in the design mode of page.
~ Prince