Is there a way to customize the header?

[system]

Hello, I’m Ron, an automated tech support bot

While you wait for one of our customer support representatives to get back to you, please check out some of these documentation pages:

Guides:

• Customize toolbar in viewer
• Customizing PDF.js Express Viewer - Get started
• UI & toolbar customization sample

APIs:

• Header - getItems()
• PartRetrievers.WinRTPartRetriever - setCustomHeaders(headers)
• WebViewerInstance - setActiveHeaderGroup(headerGroup)

Forums:

• Join Rectangular Tool to Main header
• How to customize the text selection tooltip
• How do i create custom items menu called Popular and set it to the default selection?