Toggle last active panel with panel selector

`F4`

All hotkeys for Opera (MacOS)

Navigation Move one line up	`Up Arrow`
Navigation Move one line down	`Down Arrow`
Navigation Move one character to the right	`Right Arrow`
Navigation Move one character to the left	`Left Arrow`
Navigation Move one screen Up	`PgUp`
Navigation Move one screen Down	`PgDn`
Navigation Move one screen to the left	`Command` + `PgUp`
Navigation Move one screen to the right	`Command` + `PgDn`
Navigation Go to top	`Home`
Navigation Go to bottom	`End`
Focus Cycle focus within active context	`Tab` / `Shift` + `Tab`
Focus Activate	`Enter`
Focus Edit Item properties	`Option` + `Enter`
Focus Exit Context or Cancel	`Esc`
Focus Display Context menu	`Command` +M
System Open file	`Command` + `O`
System Save copy of page	`Command` + `S`
System Save copy of page with all images and elements	`Command` + `Option` + `S`
System Print page	`Command` + `P`
System Close Opera	`Command` + `Q`
System Hide Opera	`Command` + `H`
Text Editing Undo recent changes	`Command` + `Z`
Text Editing Redo recent changes	`Command` + `Y`
Text Editing Copy selection to clipboard	`Command` + `C`
Text Editing Move selection to clipboard	`Command` + `X`
Text Editing Paste from clipboard	`Command` + `V`
Text Editing Copy selected text to "Notes" panel	`Command` + `Shift` + `C`
Text Editing Copy text in clipboard to "Notes" panel	`Command` + `Shift` + `V`
Text Editing Clear all	`Command` + `U`
Text Editing Select all	`Command` + `A`
Text Editing Delete selection (or character right of cursor)	`Delete`
Text Editing Delete selection (or character left of cursor)	`Backspace`
Text Editing Toggle text-style bold	`Command` + `B`
Text Editing Toggle text-style italic	`Command` + `I`
Text Editing Toggle text-style underline	`Command` + `U`
Find Find text	`Command` + `F`
Find Find next instance of text	`Command` + `G`
Find Find previous instance of text	`Command` + `Shift` + `G`
Find Search for text in links in page (press F9 first to set focus on page)	`,`
Find Search for text in page (press F9 first to set focus on page)	`.`
Access Loading Go to your Homepage	`Ctrl` + `Spacebar`
Access Loading Enter a Web address	`F2`
Access Loading Paste and go in current or new tab	`Command` + `B`
Access Loading Paste and go in background tab	`Command` + `Shift` + `B`
Access Loading Enter nickname for fast bookmark access	`Shift` + `F2`
Access Loading Save page address as new bookmark	`Command` + `D`
Access Loading Save as new bookmark in active bookmark folder	`Command` + `Shift` + `D`
Transmission Loading Reload (get latest version of) page	`Command` + `R`
Transmission Loading Reload selected frame	`Option` + `F5`
Transmission Loading Reload all open pages	`Command` + `F5`
Transmission Loading Stop page loading	`Esc`
Transmission Loading Read selected text using voice function	`V`
Transmission Loading Cancel current voice prompt	`Esc`
History Go to next page in history	`X`
History Go to previous page in history	`Z`
History Rewind	`Shift` + `Z`
History Fast Forward	`Spacebar`
History Show entire forward history	`Option` + `X`
History Show entire backward history	`Option` + `Z`
Sitemap Navigation Home	`Command` + `Shift` + `Spacebar`
Sitemap Navigation Search	`Command` + `Shift` + `F`
Sitemap Navigation Previous	`Command` + `Shift` + `Left Arrow`
Sitemap Navigation Next	`Command` + `Shift` + `Right Arrow`
Sitemap Navigation Up	`Command` + `Shift` + `Backspace`
Display Load and display all images	`I`
Display Toggle loading of images	`Shift` + `I`
Display Toggle between "Author mode" and "User mode"	`Shift` + `G`
Display Preview page as if printed	`Shift` + `P`
Display Use entire screen for browsing	`F11`
Display Toggle "Fit to width"	`Command` + `F11`
Display Pretend to be small-screen device	`Shift` + `F11`
Source View page source	`Command` + `F3`
Source View source of active frame	`Option` + `F3`
Source Validate source of active page or frame	`Command` + `Option` + `V`
Source Validate source of active page or frame in the background	`Command` + `Option` + `Shift` + `V`
Link Select next link in page	`A`
Link Select previous link in page	`Q`
Link Follow selected link	`Enter`
Link Open selected link in new tab	`Shift` + `Enter`
Link Open selected link in background tab	`Command` + `Shift` + `Enter`
Link Save selected link as new bookmark	`Command` + `Shift` + `D`
Link Copy selected link address	`Command` + `Option` + `C`
Link Save link target (such as document or image)	`Command` + `Shift` + `S`
Form Log in/autofill form using the Wand	`Command` + `Enter`
Form Go to next element in form	`Tab`
Form Go to previous element in form	`Shift` + `Tab`
Form Select form element	`Spacebar`
Form Left adjust text in form	`Command` + `L`
Form Right adjust text in form	`Command` + `R`
Panel Toggle last active panel with panel selector	`F4`
Panel Toggle last active panel	`Shift` + `F4`
Panel Activate panels for keyboard navigation	`F7`
Panel Expand all folders/views in panel	`Shift` + `Right Arrow`
Panel Collapse all folders/views in panel	`Shift` + `Left Arrow`
Panel Open "Search" panel	`Ctrl` + `1`
Panel Open "Bookmarks" panel	`Ctrl` + `2`
Panel Open "Mail" panel	`Ctrl` + `3`
Panel Open "Contacts" panel	`Ctrl` + `4`
Panel Open "Chat" panel	`Ctrl` + `5`
Panel Open "Notes" panel	`Ctrl` + `6`
Panel Open "Transfers" panel	`Ctrl` + `7`
Panel Open "History" panel	`Ctrl` + `8`
Panel Open "Links" panel	`Ctrl` + `9`
Panel Open "Windows" panel	`Ctrl` + `0`
Bookmarks Open bookmark	`Enter`
Bookmarks Open bookmark in new tab	`Shift` + `Enter`
Bookmarks Open bookmark in background tab	`Command` + `Shift` + `Enter`
Email Check e-mail	`Command` + `K`
Email Write new message	`Command` + `E`
Email Save message draft (continue later)	`Command` + `S`
Email Upload queued messages to mail server	`Command` + `Shift` + `K`
Email Send composed message	`Command` + `Shift` + `S`
Email Reply to message	`R`
Email Reply to all recipients of message, including sender	`Shift` + `R`
Email Forward message	`F`
Email Redirect message	`D`
Email Continue editing message (Drafts, Outbox, and Sent views)	`Enter`
Email Focus "Quick reply" field	`Q`
Help Open Opera's help window	`Command` + `?`
Help Search while viewing help page	`Command` + `F`