Putting visual images in a PowerPoint presentation makes the reader understand the idea more rapidly rather than making bullets and filling up the slides with sentences. If there is still need to put words in the pictures than limit it to just one or two words, that is what Garr Reynolds wrote in a book Presentation Zen some years back. The reason behind this concept is that the human brain processes verbal and visual data side by side. Pictorial description when chosen effectively makes the audience get that point easily and then complement it.
Some people don’t know how to get those high-quality images. Do you know it? No? there’s nothing to worry about it because we have a platform named Flickr which contains approximately 7 billions or more images. These images are very attractive and useful and are also licensed by Creative Commons.
Creative Commons is an American based non-profit organization that gives license to images. When someone takes images and wants to make that image an official property then creative commons helps them to get a copyright to that image. Now if you want that image in any way then the proper way to get that image is by contacting the owner of that image and ask for permission. If the image is in Creative Commons than it can be used without permission. In case of your Coursera lectures, images licensed for commercial use can be used.
When you need a picture for using it in a presentation then go to Comfited and type the keyword (like birds) there appears a large number of images. In the left side of the make sure to apply filter by clicking on the commercial tag. The images that are permitted for commercial use only will appear. If you are attracted by any image then click on it, you will be directed to the Flickr page of that picture. Look for license details of that picture and make yourself confirm that the image is with the proper license.
Now for saving that photo look up at the menu for “Actions”, and select the option of “View all sizes”. Then select the larger version to save and then use in your presentation. Images with smaller sizes should not be selected because when that images will be stretched to make it larger then pixels of that image will be disturbed resulting in a blurry image, which is not quite presentable. The recommended size is 1024 pixels. Bigger than that is also not good as it will take time to load.
Another point to note is to always remember to credit the image licensed under Creative Commons.
The technical details on the above-mentioned point are to be depended on the computer system one is using.
Do you think that image doesn’t represent any specific idea? then it may not be evident. It is obliging to think analogously rather than literally. In other words, the conceptual layer needs to be skipped.
If there is a need to have a specific image like heart or brain than there is also a platform. Wikimedia Commons (WC) is a platform that contains all the images available on Wikipedia. Many images available on this platform can be used as the license of the images are expired are free to be used for commercial purposes. Just search for the picture and find the proper size of that photo.
So that is how one can make a presentation that can be well-understood by the audience and let you make the presentation earlier and copyright free. In this era of computer, there is a need to protect the intellectual property rights of the others.