Change of Progress bar at the top of the page

There is a default functionality of canvas that shows the progress bar in case of interface call or download, upload.
This is a grey line at the top of the page.
I would like to change it but I did not find any user manual or documentation about it and even more, I could not find it on any page or in the header.
Could you help me with how this change is possible?

Hello @zsoldoszsolt welcome to the community!

Could you please show a couple of pages and highlight where this is taking place? (screenshots would be awesome!:smiley: )

Thanks @cmarchan !

Please see my attached screenshot:

Hello @zsoldoszsolt

Thanks!

This is actually a Bubble setting not a Canvas one: