Widget Variations
There are 7 stylistic widget class suffixes which provide a unique style variation to the widget: title1-4 and box1-3. There are also various additional structural suffixes, these affect the layout and metrics of the widget.
Using a Suffix: Enter any available suffixes at Greenery theme → Widgets tab → Widget (you want to use) → Class field. You can compound multiple suffixes together such as: box1 title2.