Slant is the predominant angle of the downward stroke in handwriting based on Latin script. The slant of a sample of writing is a feature of many regional handwriting variations, and also a reflection of the copybook that is taught.
| Slant ! | When introduced | Region of origin | ||
|---|---|---|---|---|
| Handwriting without Tears | 90 | 1976 | United States | |
| Carolingian | 90 | 9th century | Europe | |
| Humanistic Hand | 90 | 15th century | Europe | |
| Zaner-Bloser | ? | 1904 | United States | |
| D'Nealian | 85 | 1978 | United States | |
| Getty-Dubay Italic | 85 | 1976 | United States | |
| Palmer Method | 85 | 1884 | United States | |
| BFH script | 80 | 1997 | United States | |
| Copperplate | 55 | 17th century | Europe | |
| SmithHand | 55 | 2000s | United States | |
| Spanish Copybook | 55 | 1650s | Central Spain | |
| Spencerian | 52 | 1840s | United States |
A good basis for its estimation is the point of the handwritten curve where the velocity has its peak value in the downward stroke. The polar distribution of the running angle along a handwritten trajectory is another good method for estimating the slant angle. Left-handed writing is often accompanied by a slant value which is larger than 90 degrees, i.e., it is bent backward, to the left.
In graphology slant can refer to either upstroke or downstroke values. These strokes can be made in the upper, middle, lower, or any combination of those zones.
In handwriting recognition, an affine transformation can be used to normalize handwritten input towards a population average or towards 90 degrees.