You may either use {{Reviewing}} by itself for the default message or you may add a customized label with an optional parameter value. [To change the word "doing" to a word of your choice, type a pipe symbol after the “Doing” text followed by your personal text.]
Any of the following inline, comment-level templates can be converted into {{Resolved}}-style hatnotes by using {{Resbox}} to put a box around the icon and text.
{{enUici|Wikipedia:List of discussion templates|List of discussion templates]], a more linear table of essentially the same set of templates
Template:Resolved/See also, the smaller family of thread-level hatnote templates, similar to the above but with a box around them; any template above can be converted to one of those with {{Resbox}}