When using a screenshot it’s best to match the background. Take a screenshot on a similar color background or use a PNG with a transparent background as this will look the most seamless.
Usage guidelines
Do
Use images with a similar or transparent background
Don't
Don't use images with opposite backgrounds to the slide background
📍Tip: Seamless image backgrounds
If you need to use a specific image but the slide background doesn't match, you can change the background color to match the image's background color.
Adding images
Images can be added to any presentation by dragging and dropping, copy and pasting, or inserting from the toolbar in Keynote, Google Slides, and Figma.
Adding images in Keynote
Source
Description
Example
Browser
Drag and drop any image from the web browser into Keynote
Local machine
Drag and drop any image from the Finder into Keynote
Replacing images in Keynote
Step
Example
Select the image and click the Image tab
Click the Replace
Select the new image and click Open
Adding images in Google Slides
Source
Description
Example
Browser
Drag and drop any image from any tab in your web browser into the tab with Google Slides
Local machine
In the toolbar select Insert > Image > Upload from computer
By URL
In the toolbar select Insert > Image > By URL and paste the image's URL
Replacing images in Google Slides
Step
Example
With the image selected, click Replace Image in the toolbar