export declare const DOCUMENT_CHARACTER_SCALE_ATTRIBUTE = "data-office-character-scale-percent";
export declare const DOCUMENT_CHARACTER_SCALE_DEFAULT_PERCENT = 100;
export declare const DOCUMENT_CHARACTER_SCALE_MIN_PERCENT = 1;
export declare const DOCUMENT_CHARACTER_SCALE_MAX_PERCENT = 600;
export declare function normalizeDocumentCharacterScalePercent(value: unknown): number | null;
export declare function documentCharacterScaleDomAttributes(value: unknown): Record<string, string>;
export declare function documentCharacterScalePercentFromElement(element: HTMLElement): number | null;
export declare function documentCharacterScalePercentFromCss(value: unknown): number | null;