Changing My People Cover Photo
You can set an image file up to 5 MB to be used as your cover photo.
For the Desktop View, the height of the configured cover photo is fixed to 64 px and the width is enlarged/shrunk according to the web browser's width.
To set your cover photo, use the following steps.
Click your user name on the upper right of the screen, and click the camera button .
Select a file to use as your cover photo and click Save.