textScale property
Scales the line-number font size relative to the code. Defaults to 1.0
(numbers match the code size).
A value below 1.0 renders smaller numbers, e.g. 0.9, matching the
convention in editors where the gutter recedes behind the code. Numbers
keep the code's baseline and row height, so they stay aligned; only the
glyph size shrinks.
Implementation
final double textScale;