Display modes

Modal

Shows a button or thumbnail that opens a Bootstrap modal with the built-in viewer (lazy-loaded). Best for article body content where you do not want a tall iframe until the visitor asks.

• Default when Modal thumbnail is enabled: auto first-page preview
• Use thumb="0" for a classic text button
• Use height to control modal body height (for example 80vh)

Embed

Renders the viewer in the article. header="0" (plugin default) shows only the frame. header="1" adds title/meta and toolbar actions above the viewer.

Download

Outputs a download button/link only. Useful for attachments where in-page viewing is not needed.

Viewer engines

• builtin (recommended): continuous multi-page scroll, consistent cross-browser UI, and better download control
• native: device browser PDF viewer inside an iframe