Best practice is to use sans-serif fonts, rather than serif or decorative fonts. Sans serif do not have the decorative lines. The fonts would include Arial, Calibri, Century Gothic, Tahoma, and Verdana. The font size should be 24 pt font for the body text. The font could be larger depending on the audience or page layout.
Open the Power Point you would like to check.
Select "Review" tab from at the top of the PowerPoint.
Select the "Accessibility Checker" from the selections.
A report will come up with issues.
Selecting the issues will bring you them in the Power Point
- Has the selected issue.
- Is highlighting the issue.
In this case there is missing alternative text. Though other issues could arise in Power Point.