Hi Luigi,
Thanks for your question.
Here is a code snippet to help you enable the panToolButton.
import WebViewer from '@pdftron/pdfjs-express-viewer'
WebViewer({
...options
}).then(instance => {
const { Tools } = instance.Core;
const panTool = Tools.ToolNames.PAN;
instance.UI.setToolMode(panTool);
})
Hope this helps and let me know if this approach works for you.
Thank you,
Dandara