Set fill settings for desktop background image Ubuntu budgie 17.04

Solution 1:

For 17.04 the default picture options for wallpapers can be set via the command line:

gsettings set org.gnome.desktop.background picture-options 'none'
gsettings set org.gnome.desktop.background picture-options 'wallpaper'
gsettings set org.gnome.desktop.background picture-options 'centered'
gsettings set org.gnome.desktop.background picture-options 'scaled'
gsettings set org.gnome.desktop.background picture-options 'stretched'
gsettings set org.gnome.desktop.background picture-options 'zoom'
gsettings set org.gnome.desktop.background picture-options 'spanned'

To reset back to the default:

gsettings reset org.gnome.desktop.background picture-options

Solution 2:

Late to answer on this one, but for anyone who is interested.

You can also install the gnome-tweak-tool, which is now called gnome-tweaks as of 18.04. You to the tab Appearance you will then find the setting under Adjustment.

sudo apt-get install gnome-tweak-tool

or if you are version 18.04 or later.

sudo apt install gnome-tweaks