There is no APA Poster format, but this PowerPoint template uses APA citation and tables/figures format. There are other tools you can use to create a poster; just be sure to follow APA guidelines for figures/tables and citations.
See your professor or conference for your required sections. Typical posters follow the IMRaD format: Introduction, Methods, Results, and Discussion/Conclusion. See the Humanities Poster page for more section ideas.
Other sections include:
Most of these instructions are for Powerpoint on a desktop.
See the Lynn Style guide.
See the Lynn Style guide.
See the APA style guide, Accessible Use Of Color in Figures, for information about Accessibility and Colors.
This depends on the size of your poster. Follow these suggestions for best accessibility.
Note that an image that looks good on the computer screen will not necessarily print well (Elements drawn with PowerPoint’s drawing tools will retain their sharpness at any size)
Image Source: https://alexanders.com/additional-resources/dpi-resolution-and-proportion/