If you want to change account settings:
- Go to configuration and then Account settings
- Anonymous user is the user which has no account in website, can change its name like guest
- And can set setting according to you, for which you want to permit users
- You can also set personalized setting, in which you can set which size of pic can user upload and so on
- You can set email setting, which are sends to users in different-different cases
- At last save configuration to save the changes you make
The pictures uploaded at website will be store at directory ‘first/sites/default/files/pictures’.