Windows
7 curated resources, easiest first.
A set of ways to stretch battery life on a Windows PC, covering energy recommendations, energy saver, display brightness and refresh rate, and wireless features. Separate instructions are given for different Windows versions.
How to adjust text and app size, resolution and screen orientation on Windows 10 and 11, including picking a monitor when you have more than one. It notes the recommended option is usually best because lower resolutions look less sharp.
Explains how Windows notifications work and how to silence them with Do Not Disturb, either manually or on a schedule, while still allowing chosen apps or reminders through.
Shows how to switch between light, dark and custom colour modes and pick an accent colour, either automatically from your background or by hand. It also links to contrast and colour-filter accessibility options.
Walks through the Power & battery settings that control sleep timers, power mode and background activity so you can save energy or extend battery life.
Several ways to toggle Bluetooth on Windows 10 and 11. Switching it off and on again can also reset a flaky connection.
A tour of the main categories in the Windows Settings app with links to help for tasks in each one. Written for keyboard and screen reader users but useful as a map of where settings live.