Know which values change by input device
A pressure-capable pen can vary width with force and can also control opacity when that option is enabled. Mouse and touch use a constant pressure value, so they will not produce the same variation. Draw one light and one firm short stroke first to verify that pressure data is reaching the canvas.
Choose presets by edge and overlap
Soft brush favors feathered edges and layering, ink pen gives a crisp contour, pencil adds light texture, marker lays down a broad even band, and calligraphy emphasizes directional width. Compare the overlap of two strokes and the shape of each endpoint rather than choosing by name alone.
Do not raise minimum width and opacity together
A high minimum-pressure width keeps even a light stroke thick. Combining it with strong opacity response can hide subtle hand movement. Set the minimum width first, then enable pressure opacity only when lighter strokes are part of the intended look.
Diagnose missed taps separately from palm input
When marks seem to disappear, enable Input Check and tap the canvas ten times to compare received signals with painted strokes. If a palm creates unwanted lines while using a pen, disable touch drawing. Two-finger zoom and pan remain available, so navigation does not need to be sacrificed.