Highlight your relevant skills and consider using subheadings to more specifically show your expertise. For example, my resume includes “Legal Recruiting Experience” and “Legal Experience” subheadings so that potential employers will see exactly what I wanted them to see and what was most relevant to them will be, literally, front and center on my resume.
Do not use a Functional Resume to “hide” gaps. This only invites the reader to find them.
If you anticipate having a gap on your resume soon, consider all of your options. Can you volunteer in your area of interest? Can you attend classes to keep up with the changes in your industry? Can you write a blog and comment on LinkedIn discussions to stay current and to keep your name in front of potential clients and hiring managers? Include relevant volunteer experience and CLE classes to show your dedication to your practice area or your interest in a new one.