Perhaps include a way to auto-size/auto-space the resume so it can fill an entire page? I'm early in my career, and my content doesn't quite fill the entire space for most themes.
The auto-sizing can be hit or miss since it keeps font sizes relative, but there are still a few tricks that you can try. I can suggest trying the following: increase padding (under "Resume Layout"); increase nameplate and section header font sizes; use vertical configurations for the nameplate, contact, and/or skills sections; configure "Employment Details" to use more rows instead of columns.
That's what I can think of off the top of my head. Experiment with one column vs. two columns as well - hope this helps!
That's what I can think of off the top of my head. Experiment with one column vs. two columns as well - hope this helps!