Identification:

• name
• title

Geometry:

• left
• top
• width
• height
• min-width
• min-height
• fullscreen

Decorations:

• left-fringe
• right-fringe
• right-divider-width
• bottom-divider-width

Content:

• foreground-color
• font
• line-spacing

Background:

• background-mode
• background-color
• alpha-background

Cursor:

• cursor-color
• mouse-color

Misc:

• alpha
• minibuffer
• undecorated
• display

NeXTSTEP (now “macOS”):

• ns-appearance
• ns-transparent-titlebar