Available in version 3.4 or later.

Use Ctrl + K to invoke command palette:

Command palette is fast and convenient way to:

• access all SumatraPDF functionality
• open previously opened files
• switch to another tab

How to use it:

• press Ctrl-K to show command palette window
• enter text to narrow down list of matches
• up / down arrow navigate between matches
• Enter to execute selected match (or double-click with mouse)
• Escape to close the window (or click outside of it)

The list contains:

• list of currently opened files (tabs)
• list of recently opened files
• commands