Multi-Document Tabs

Spark opens multiple PDFs in tabs, each with its own independent state (pages, zoom, undo stack).

Opening Multiple Documents

• File → Open opens in a new tab by default.
• Drag a PDF onto the Spark window — opens in a new tab.
• From the Recent list, Ctrl+Click opens in a new tab; plain click replaces the current tab (configurable in Settings).

Tab Bar

Tabs appear across the top of the window. Each tab shows:

• The file name.
• A modified marker (dot or asterisk) if there are unsaved changes.
• A close button (×) that appears on hover.

Switching Tabs

Click a tab to activate it.

Tab Context Menu

Right-click a tab for:

• Close — close this tab (prompts if modified).
• Close Others — close all except this one.
• Close All to Right.
• Close Saved — close all tabs that have no unsaved changes.
• Copy Full Path — copies the file path to clipboard.
• Open Containing Folder — opens File Explorer at the file's location.
• Pin / Unpin Tab — keeps the tab at the left and exempts from Close All.

Reordering

Drag a tab left or right to reorder.

Drag a Tab Out

Drag a tab below the tab bar to detach it — it becomes its own Spark window. Useful on multi-monitor setups.

To re-dock, drag the detached window's tab back onto the main window's tab bar.

Independent State

Each tab has its own:

• Current page.
• Zoom level.
• View mode (Single / Continuous).
• Split view configuration.
• Selected annotations.
• Undo / redo stack.
• Tool (active drawing tool).

Switching tabs does NOT affect other tabs' state.

Cross-Tab Operations

• Copy / paste annotations — copy in one tab, switch tab, paste.
• Copy / paste pages — same, at the document level.
• Drag thumbnails from one tab into another (where supported).

Saving Multiple Tabs

• Ctrl+S saves the active tab.
• File → Save All saves every modified tab.
• Closing a modified tab prompts for save/discard/cancel.

Tab Overflow

If you open more tabs than fit the bar, arrows appear on either end of the bar for scrolling. A dropdown arrow lists all open tabs alphabetically for quick selection.

Memory Usage

Each open tab holds the document in memory. For very large PDFs (200+ pages at high resolution), two or three tabs can use significant RAM. Close tabs you're not actively using.