Why It Happens
Images and other content are displayed pixel by pixel - meaning content is shown at its native resolution rather than being stretched to fill the screen. On high-resolution screens (Full HD or 4K), low-resolution images will appear centered with empty space around them rather than filling the full screen.
Example: An image sized 1441 x 809 pixels will not fill a Full HD (1920 x 1080) screen - it will appear centered with black or empty borders around it.

How to fix it
Use the correct image resolution
Upload images that match your screen's native resolution:
Full HD - 1920 x 1080 pixels (landscape)
4K - 3840 x 2160 pixels (landscape)
8K - 7680 x 4320 pixels (landscape)
If you see an error message indicating the file size is too small, resize the image to a higher resolution before uploading.
Use PDF format for presentations and documents
PDF files exported from PowerPoint or similar tools are designed to fit standard screen sizes and typically result in a better viewing experience than uploading individual images.


