What merging tabs means and when you'd use it

Merging tabs in Opera means combining multiple browser windows into a single window, each with its own set of tabs. This is useful when you've accidentally opened a second Opera window, or when you want to consolidate your work into one place instead of switching between windows.

Opera doesn't have a single "merge" button that combines tabs from different windows. Instead, you move tabs from one window to another by dragging them, or you close one window and reopen its tabs in the main window. The method you choose depends on whether you want to keep the tabs organized in a specific order or just get them all into one place.

This is different from grouping tabs within a single window — that's a separate feature Opera calls tab islands. Merging is about consolidating windows themselves.

Key Takeaways

  • Opera doesn't have an automatic merge function; you combine windows by dragging tabs between them or reopening tabs from a closed window.
  • The fastest way to merge is to drag the tab bar from one window into another, which moves all tabs at once.
  • If you've already closed one window, you can reopen its tabs by pressing Ctrl+Shift+T (Windows) or Command+Shift+T (Mac) repeatedly until all tabs return.
  • Tab islands let you group related tabs within a single window, which is often simpler than managing multiple windows.

Dragging tabs between two open windows

If you have two Opera windows open side by side, the simplest way to merge them is to drag tabs from one window into the other. Click and hold on a tab's title, then drag it to the tab bar of the other window. The tab will move to that window when ready.

To move multiple tabs at once, hold Ctrl (Windows) or Command (Mac) and click each tab you want to select. Then drag any of the selected tabs to the other window — all selected tabs will move together. This is faster than dragging tabs one at a time.

If you want to move every tab from one window into another, you can select all tabs in that window by pressing Ctrl+A (Windows) or Command+A (Mac), then drag them to the other window. After you've moved all the tabs, the empty window will close automatically.

Reopening tabs from a closed window

If you've already closed one of the Opera windows and want to recover its tabs, use the undo function. Press Ctrl+Shift+T (Windows) or Command+Shift+T (Mac) to reopen the last closed tab. Each time you press this combination, Opera reopens one more tab from the closed window, in reverse order from when you closed them.

Keep pressing Ctrl+Shift+T until all the tabs you want are back. They'll reopen in a new window. Once they're open, you can drag them into your main window using the method described above, or you can drag the entire tab bar from the new window into the main one.

This method works only if you've just closed the window. If you've closed Opera entirely and reopened it, the closed window's tabs are gone unless you had session recovery turned on. You can check this in Settings — look for "On startup" and make sure it's set to "Continue where you left off" if you want Opera to remember open windows and tabs between sessions.

Using tab islands to organize within one window

Instead of managing multiple windows, you can organize tabs within a single window using tab islands. Right-click on a tab and select "Create tab island" to start a new group. Drag other tabs into that island to keep related work together. You can name each island and collapse it to hide its tabs without closing them.

Tab islands are often easier to work with than multiple windows because you see all your groups in one place, and you don't have to switch between windows. You can also color-code islands to make them visually distinct. This approach keeps your workspace cleaner and reduces the chance of accidentally closing a window with tabs you need.

Preventing accidental multiple windows

Opera sometimes opens a second window instead of a new tab if you click a link with a modifier key held down (like Ctrl+click on Windows or Command+click on Mac). If this happens frequently, check your mouse settings — sometimes a stuck modifier key or a mouse button sensitivity issue causes unintended clicks.

You can also set Opera to always open links in new tabs instead of new windows. Go to Settings, then Tabs, and look for "Open links in new tabs" or similar wording. Turning this on means links will open as tabs in your current window rather than in a new window, reducing the need to merge windows in the first place.

Frequently Asked Questions

Can I move tabs between Opera and another browser?

No. Tabs can only move between Opera windows. If you want to transfer a page to another browser, copy the URL from the address bar and open it in the other browser, or use Opera's export bookmarks feature to save a collection of pages and import them elsewhere.

What happens to my tab history if I drag a tab to another window?

The tab's history moves with it. When you drag a tab to another window, that tab retains its back and forward button history, so you can still navigate through pages you visited in that tab before the move.

If I close Opera without merging windows, will the tabs be lost?

Not if you have session recovery on. Go to Settings, Tabs, and check that "On startup" is set to "Continue where you left off". This saves all open windows and tabs, so they'll reopen the next time you start Opera, even if you didn't merge them first.

Can I merge windows automatically when I open Opera?

No, Opera doesn't have an automatic merge on startup. However, if you turn on session recovery (Settings > Tabs > On startup > Continue where you left off), Opera will reopen all windows and tabs as they were, so you can then manually merge them if needed.