Support for up to 6 lines of text on Simple Letter model

Simple letter customisers in Sign Customiser now support up to 6 lines of text, doubling the previous limit of 3 lines. This enhancement allows your customers to create more complex multi-line signs with individual pricing control for each line. Whether you’re creating address signs, directional signage, or detailed business displays, you now have the flexibility to offer more comprehensive text options while maintaining precise pricing control for each additional line.