David Eldersveld has some tips to make it easier to read your dashboards:
Power BI font selection is currently limited to about two dozen choices. These include a mix of serif versus sans serif, monospaced versus not monospaced, bold versus light, and more. While I do not have a definitive list of specific fonts–and I would love additional input from readers who live with dyslexia–there are some preferred font choices as well as choices to avoid when designing Power BI reports.
Click through for good recommendations regardless of whether any of your dashboard viewers are dyslexic.