Sitting through a presentation of slides with nothing but text is a torture bordering cruel punishment. Any popular instruction beyond the basics of how to create slide decks emphasize the importance of graphics. Presenters face challenges finding inexpensive images to really make their learning or persuasion points powerfully. Learning about and finding public domain and Creative Common licensed images liberate presenters from corny clip art and open a world of high quality pictures, clip art, and video free from fees and royalties.
Public domain is the least restrictive level of licensing for any work. Something that is in the public domain is a work of intellectual property with an expired copyright, or released by the author into the public domain. Works commissioned by the U. S. Government and many educational institutions release works as public domain. Anyone may use them for any non commercial purpose for free. One may encounter advertising restrictions when images contain recognizable persons.
Creative Commons licenses come in several varieties. You can find the details of each at creativecommons.org. Generally a work released under a Creative Commons license is free to use for many purposes. The originator may choose to require an acknowledgment, limit modifications, limit commercial use, or any combination. Many times you can use works simply by providing credit to the creator or photographer which is a best using any reference not of your own creation.
Where to Find the Images
My readers will find I frequently use flickr.com for most of the images that appear in my posts. I frequently turn to flickr for my slide decks. Flickr is the big name, but not the only source for free images. Google Images provides access to lots of images. Like flickr, not all are free, but like flickr, you can filter your search result to show just public domain or Creative Commons images. Pxhere.org images are all Creative Commons licensed with no use restrictions. That means anyone can use or remix any image for any legal purpose according to the website. Clip art is more difficult to find, but a good source is openclipart.org. All images are open source. Users should familiarize themselves with the restrictions of each type of license before using images from any source.
Decks of death should be something of the past. Good presenters use images to make their points. Everyone knows a picture is worth 1000 words. Why fill your slide with boring text when an inspiring image communicates your message better? Learn to find and use free images published in the public domain or under a Creative Commons license and avoid accusations of subjecting others to cruel and unusual punishment during your next presentation.
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After lunch meeting — https://pxhere.com/en/photo/686174
Screen shot of flickr.com search by author
Screen shot of images.google.com by author
Screen shot of pxhere.org by author