If you choose the avatar icon to the right of the magnifying glass, a small dialog appears. Under Settings you can choose personal settings in the cloud. You will also be shown some personal information, such as your email address and storage space used.
Profile picture
You can set a personal profile picture by clicking on the up arrow (the picture will be searched on your computer). If you select the folder icon, you can select a picture that is already in the cloud.
Set language
You can also change the language of your Nextcloud account.
Activity
The Activity app logs events in your cloud area. Some of these activities are reported via email, others are only displayed in the cloud or its clients ("Push"). Each user can set the notifications individually by selecting Activity from the menu on the left. The picture on the right shows the default settings for the individual events.