Parameters

The "Handwriting & paper" panel groups basic settings, paper, natural variation, and cross-out effects. These are the default values; a restored draft or preset can have different values.

What jitter is for

Handwriting looks handwritten because no two characters are identical. The backend adds a small random offset to every character, drawn from a normal distribution — the "sigma" parameters control the width of that distribution. Bigger means messier; 0 means perfectly regular. The defaults are already tuned to look natural, so don't change them all at once.

Basic parameters

Parameter	Default	Meaning
Font Size	160	Character size in pixels. Bigger text means fewer characters per sheet.
Line Spacing	260	Baseline-to-baseline distance. Must exceed the font size or lines will overlap.
Top Margin	50	Distance from the text block to the top edge.
Bottom Margin	50	Distance to the bottom edge.
Left Margin	50	Distance to the left edge.
Right Margin	50	Distance to the right edge; >>> right-alignment measures from here too.
Word Spacing	1	Extra gap between characters.
Width	2800	Paper width. Mutually exclusive with a background image.
Height	3960	Paper height. Mutually exclusive with a background image.

The default paper has approximately A4 proportions. Pixel dimensions do not prescribe a print DPI.

Toggles

Parameter	Default	Meaning
Ruled paper	on	Draws a rule under every line. Also decides whether auto-generated paper is ruled.
Wider English word spacing	off	Widens the gaps between English words so they don't run together. Irrelevant for Chinese.

Natural variation

Parameter	Default	Meaning
Line Spacing Sigma	0	Variation in line spacing. Off by default.
Font Size Sigma	2	Variation in character size.
Word Spacing Sigma	2	Variation in the gap between characters.
Perturb X Sigma	3	Variation in each character's horizontal position.
Perturb Y Sigma	3	Variation in each character's vertical position.
Perturb Theta Sigma	0.05	Variation in each character's rotation, in radians.
Ink depth sigma	30	Variation in ink darkness, simulating heavier and lighter strokes.

Strikethroughs

Use these to leave a few "crossed out" marks on the page.

Parameter	Default	Meaning
Probability of a strikethrough occurring	0.005	Chance that any given character gets struck through.
Width of strikethrough	8	Thickness of the line.
Standard deviation of the strikethrough length	2	Variation in line length.
Standard deviation of the strikethrough width	2	Variation in line thickness.
Standard deviation of the strikethrough angle	2	Variation in line tilt.

Built-in preset

The presets dropdown offers "Small ruled · Yunyan", "Natural handwriting", and "Neat handwriting".

Small with underlines (Yunyan) — small text in the Yunyan font, generous line spacing and margins, with underlines:

Parameter	Preset	(Default for comparison)
Font Size	70	160
Line Spacing	100	260
All four margins	150	50
Font Size Sigma	1	2
Line Spacing Sigma	1	0
Word Spacing	2	1
Perturb X Sigma	1	3
Perturb Y Sigma	1	3
Probability of a strikethrough occurring	0	0.005
Add underline	on	on

Remove the background image before applying paper presets. The Yunyan preset selects 云烟体.ttf when that font is installed; otherwise it keeps the currently selected font.

Tuning tips

• Characters are colliding → raise Line Spacing or Word Spacing.
• Looks too tidy to be handwriting → raise Perturb X Sigma and Perturb Y Sigma.
• Looks too chaotic → lower Perturb Theta Sigma first; it affects the impression the most.
• Want to fit more per page → lower Font Size, Line Spacing, or margins.
• Changed a parameter and nothing happened → you have to click "Generate preview" again. The preview does not re-render on its own.