Editing WoW:Making a macro (section)

=== Empty conditions ===
Sometimes you may want a command to cast on a particular target under certain circumstances but behave like normal if those conditions aren't true. In this case you will want to use an empty set of conditions which will always evaluate to true. The following macro will cast Flash of Light on the unit under your mouse. If you have no mouseover or it's hostile, the macro will behave like a plain /cast Flash of Light, casting on your target and respecting self-cast key and auto-self-cast interface option. 

 /cast [@mouseover, help] [ ] Flash of Light