When in GeoLine mode, click anywhere on the canvas to start a line. Following clicks will continue painting straight line parts that are connected at sharp corners.
Rightclicking, switching to a different paint mode or using the escape or back key will complete the current line.
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LazyLine Mode allows you to freely paint smooth, continuous lines.
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In both line modes, the way your texture pattern repeats across the line can be controlled using the tiling and shifting settings.
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The option to taper line ends via curves will follow soon, until then it is possible to use specific brushtips to get a solid line with tapered start and end parts.
[EXAMPLE GIF]