You can now use the Search button in the sidebar to find any deck instantly. We also made a shortcut key (⌘K) to jump to any deck from any place in your deck.
Need to reuse a slide in another deck? Choose Add to Deck on any slide to copy it over to another deck.
The Search and Move features are currently only available on the web version of Paste®. They'll be coming to the mobile version of Paste very soon though!