questions on new Mate 20 Pro

[MrFraggle]

My wall paper is oversized for a start how do I correct this?
Left is LG V30 and on the right is the Pro.

How I do I turn off Google Assistant and remove the notification, top left, which tells me I have switched accounts and Tap to turn 'OK Google' back on.

 

[Hermes Hidayat]

My wall paper is oversized for a start how do I correct this?
Left is LG V30 and on the right is the Pro.
https://i.imgur.com/GkTT0zh.jpg

How I do I turn off Google Assistant and remove the notification, top left, which tells me I have switched accounts and Tap to turn 'OK Google' back on.

Hi, i would recommend editing the photo first OR you could screenshot the photo in the album. As they both have different ratio.

As for the Google account, i dont get what you mean.