import type { IEditor } from 'roosterjs-content-model-types';
/**
 * Increase or decrease font size in selection
 * @param editor The editor instance
 * @param change Whether increase or decrease font size
 * @param fontSizes A sorted font size array, in pt. Default value is FONT_SIZES
 */
export declare function changeFontSize(editor: IEditor, change: 'increase' | 'decrease', fontSizes?: number[]): void;