Third-person singular simple present indicative form of fine-tune.(verb)
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Use "fine-tunes" in a sentence
"This adjustment, typically found on the right eyepiece or center-focus knob, fine-tunes the binocular settings to compensate for any visual differences between your eyes."
"Korina Baver fine-tunes her powerbaiting technique for trout on a quiet Cape Cod pond."
"Windows 7: Hailing from the camp of “software that does exactly what its name implies”, Windows 7 Taskbar Thumbnail Customizer fine-tunes the size, spacing and margins of your Windows 7 Superbar icons."