Board Thread:Technical Help Desk/@comment-28600806-20180227085230/@comment-26581666-20180227090749

If you're editing in the Visual Editor (the default mode) then you need to make sure you're adding the template code in the Source Editor, which is accessible from a drop down menu next to the button that lets you cancel editing (it's the three horitzonal lines).

Also, it is possible to add an infobox and any other template automatically by clicking the Insert option and then selecting Infobox or Template respectively.