import type { PDFViewer } from 'pdfjs-dist/web/pdf_viewer.mjs';
import type { PDFScale } from '../PDFScale';
export declare const setScale: (viewer: PDFViewer) => (size: PDFScale | number) => number;
export declare const zoomIn: (viewer: PDFViewer) => (percentage?: number) => number;
export declare const zoomOut: (viewer: PDFViewer) => (percentage?: number) => number;
