Merge command: [strsidekick-subtitleh3 ]
Merge variable/item: strSidekickSubTitleH3

Comments:
This wraps [strsidekick-subtitle ] in an h3. If [strsidekick-subtitle ] is empty no h3 is generated !

Formula:
@If(pageSidekickSubTitle="";"";"< h3 >"+pageSidekickSubTitle+"</ h3 >");