Style gets talked about as though it were a personality that emerges, and that description is useless to anybody trying to build one. A style is a set of decisions that get made the same way repeatedly: line weight, how many values, what happens at edges, how faces are constructed, which colours are allowed. Written down, those decisions become something a person or a team can actually work inside.

The practical case for writing them is simple. An undocumented style cannot be taught to a collaborator, cannot be checked against, and cannot be deliberately changed, because nobody can say what it currently is. It also drifts, and drift across a long project is one of the most common quality complaints readers raise.

Find the decisions you already make

Start by looking at your last twenty finished pieces and writing down what is consistent. How thick are the lines and do they vary. How many distinct values appear. Are edges sharp or soft, and where. How are eyes constructed. What is the ratio of saturated to neutral colour. Most artists are surprised by how much is already fixed.

Then separate the decisions you like from the ones that are habit. Some will be genuine choices you would defend; others will be things you have never questioned since you learned them. Both belong in the document, but knowing which is which tells you where the style could change without losing its identity.

Write the rules as constraints

Useful style documents are written as limits rather than as descriptions. Four values plus a highlight. Line weight varies between two widths. Backgrounds never exceed sixty per cent saturation. Faces built on a three-quarter construction with the eye line at the midpoint. These are checkable, and checkable is what makes a document worth having.

Vague entries do nothing. A note saying warm and inviting cannot be applied by anybody, including the person who wrote it. The colour version of a checkable constraint is described in the palette notes, where actual values do the work that adjectives cannot.

Constraints produce recognisability

Artists often assume a recognisable style comes from a distinctive technique. More often it comes from restriction: a limited palette, a consistent proportion system, a small set of compositional habits. Restriction makes work identifiable at a glance because the same relationships keep appearing, which is what recognition actually is.

This is also why a style built by adding features rarely settles. Every new technique widens the range and reduces recognisability, and the work ends up looking like a survey. Subtraction is usually the faster route to a look somebody can identify from across a room.

A style document for more than one person

As soon as a second artist is involved, the document stops being optional. It should contain the constraint list, a small set of approved examples, and a short list of common errors with corrections. Character-specific rules belong on character sheets instead, as described in the sheet piece.

Keep it short. A two-page document gets read and applied; a twenty-page one gets skimmed once and ignored. If something cannot be stated in a line, it probably is not a rule yet, and forcing it into words is a useful exercise in deciding whether you meant it.

Tools belong in the document too, at least at the level of what they must produce. Which brush behaves as the line tool, what resolution work is made at, which colour profile the files carry, how layers are named and grouped. None of this is glamorous and all of it causes real trouble when two people guess differently, particularly once files start moving between machines.

The same applies to output. Deciding once what a finished file looks like, in format, size and naming, removes an entire class of small daily decisions and makes an archive searchable years later. Most artists arrive at this after losing something, which is a slower way to learn it than reading a paragraph.

Keeping a style alive

Review the document once a year. Styles that never change become ruts, and ruts are usually visible to readers before they are visible to the artist. Changing one constraint deliberately, and then living with it for a body of work, is a controlled way to develop without abandoning what has been built.

The alternative, drifting without noticing, produces work that is inconsistent rather than developing. Consistency is what makes development legible, which is one of those apparent contradictions that turns out to be straightforwardly true in practice. Our own working standards are set out in the editorial principles.