Which method helps maintain uniform thickness in poster lettering?

Correct answer: Use a suitably sized flat brush with even pressure

The governing concept is consistent brush pressure and tool control. A suitably sized flat brush deposits a predictable width, and maintaining even pressure through each stroke keeps the lettering uniform. Changing brush sizes can produce inconsistent widths; too much water makes poster colour run or spread; repeated reworking disturbs the edges and creates patches. Practising the strokes on scrap paper before the final poster improves control and confidence.