Every settings section a project can carry under settings/, by the package that defines it. Values are reflected properties: the key in the file is the property name.

Section	Defined by	Properties
Core	engine	2
Framebuffer	engine	3
Units	engine	2
Rendering	deki-rendering	4

Engine sections

Core settings

Project settings section Core (CoreProjectSettings).

Category: Settings · Type GUID: 6b2f4d17-8c93-4a5e-b0d6-27e91fa3c845

Property	Type	Default	Constraints	Description
capFps	bool	true		Cap play-mode FPS at the target frame rate below. Disable to let the game run at the editor's refresh rate (typically 60 Hz with vsync).
targetFps	int32	60	1 to 240	Target frame rate (FPS) when capping is enabled. The game tries to hit this rate; if the hardware can't keep up it runs slower. Ignored when 'Cap FPS' is off.

Framebuffer settings

Project settings section Framebuffer (DisplayProjectSettings).

Category: Settings · Type GUID: 1c8e7f24-3a9b-4d52-8e6c-f1a40b2d9e83

Property	Type	Default	Constraints	Description
targetWidth	int32	320	1 to 4096	Logical render width in pixels. The engine renders into this resolution; the device or desktop preview upscales to the actual display.
targetHeight	int32	240	1 to 4096	Logical render height in pixels. The engine renders into this resolution; the device or desktop preview upscales to the actual display.
colorFormat	enum	RGB565	RGB565, RGB888, ARGB8888, RGB565A8	Framebuffer pixel format. RGB565 (default) is the smallest and fastest — typical for embedded displays. RGB888 gives full 8-bit color but uses 50% more memory. ARGB8888 adds an alpha channel and uses 100% more memory.

Units settings

Project settings section Units (UnitProjectSettings).

Category: Settings · Type GUID: 3eaf9b46-5c1d-4f74-af8e-132d6f4abca5

Property	Type	Default	Constraints	Description
inspectorUnit	enum	Pixels	Pixels, Meters	Inspector display preference. Pixels: physical-quantity fields show as px / px/s / px/s². Meters: same fields show as m / m/s / m/s². Internal storage is always meters either way.
pixelsPerMeter	float	16	1 to 1024	World scale: how many framebuffer pixels render one meter of world space. Drives inspector px<->m conversion and the default zoom of new cameras (CameraComponent::pixelsPerMeter sentinel).

Sections defined by packages are documented on each package's own site (linked above).