Use the Web Editor to replace slides with JPEG, PNG, or TIF image files. For example, if you want to update a slide in your original slide deck, you can generate an image file for it and then replace the corresponding slide in the presentation using the Web Editor.
To replace slides in a presentation:
1. Select a slide in the timeline and click Replace Slide.
2. Browse to the image file (.jpg, .png, .tif) you want to use, select it, and click Open. The selected slide's image is replaced with the one in the image file.
3. Click Undo or Redo to back out of changes as needed. Once you have completed your edits, save your changes.