How to Build a Custom Toolbar in a React PDF Viewer?

TL;DR: A custom toolbar in a React PDF Viewer lets developers replace default controls with tailored actions for navigation, zoom, search, annotations, and printing. Instead of relying on built-in UI, teams can design responsive, accessible toolbars with custom icons, toggle states, tooltips, and integrated search. This approach improves performance, ensures consistent branding, and gives developers full control over document workflows, especially in large-scale or enterprise apps built with Syncfusion solutions. Delivering a seamless PDF experience in modern web applications requires more than just rendering documents. Developers often need toolbars that align with branding, improve usability, and provide advanced features beyond the defaults. Out‑of‑the‑box controls can feel limiting when apps demand tailored navigation, responsive layouts, or workflow‑specific tools. The Syncfusion ® React PDF Viewer provides developers with the flexibility to fully customize the toolbar, tailoring