Tweak (verb)

1. To make a minor adjustment to something in order to improve it.
2. To adjust or manipulate something slightly or gently.

Origin:

The word 'tweak' is of uncertain origin but is likely derived from a middle english word meaning 'to twitch'.

Examples:

1. The software developer tweaked the code to fix a bug that was causing the program to crash.
2. The chef tweaked the recipe to make the dish less spicy.
3. The graphic designer tweaked the logo to make it look more modern.
4. The mechanic tweaked the engine to increase its performance.
5. The sound engineer tweaked the levels to achieve a more balanced mix.