import type { ContentModelSegmentFormat, IEditor, ShallowMutableContentModelParagraph } from 'roosterjs-content-model-types';
/**
 * Set font size
 * @param editor The editor to operate on
 * @param fontSize The font size to set
 */
export declare function setFontSize(editor: IEditor, fontSize: string): void;
/**
 * @internal
 * Internal set font function shared by setFontSize and changeFontSize
 */
export declare function setFontSizeInternal(fontSize: string, format: ContentModelSegmentFormat, paragraph: ShallowMutableContentModelParagraph | null): void;