One line per page, so you can find the right one by what you are trying to do. The documentation index has the same pages as a tree.

Topic	Page
Setting up for the first time, board to moving blind	Getting started
Which board to buy, pinouts, radio pin requirements	Hardware
Which devices work, and the named type/manufacturer tables	Supported devices
Every YAML key, and the options entities share	Configuration reference
cover: — shutters, blinds, awnings, openers, curtains	Covers
light:, lock:, switch:	Lights, locks and switches
climate: — heating, experimental	Heating and climate
rename_device, identify_device, force_open_device	Home Assistant actions
linked_remotes:, exposed_senders:	Linked remotes and sender events
oneway_controllers: — transmitting 1W commands	Sending 1W commands
Discover & Pair, Scan Paired Devices, pairing diagnostics	Pairing
Recovering a key from an existing hub	Key extraction
Active Issue, Link Health, Last Command	Diagnostic entities
Flashing the LR1121's radio firmware	LR1121 firmware update
Radio timing and discovery parameters	Radio tuning
Sending undecoded opcodes to learn what a device answers	Diagnostic probes
When something is broken	Troubleshooting · FAQ
Grouping entities, composing a 1W slider	Tips and tricks
How the component is built	Architecture overview
Reporting a device, sending a pull request	Contributing · Development setup