tweak

a slight change that you make to a machine, system, story, etc. to improve it; to make such a such การปรับเปลี่ยนเล็กน้อย; ปรับเปลี่ยนเล็กน้อย

He made tweaks to the plot and created four new characters.

With 3,500 3G sites in the Bangkok metro area and 42 other provinces, plus a 3G subscription base of 25.3 million, DTAC can easily tweak the system to make it more efficient and reliable.

With the change of location also comes a tweak in the art gallery's mission.