Toggle the overwrite flag

`Insert`

All hotkeys for CodeMirror

General (Windows) Select all	`Ctrl` + `A`
General (Windows) When multiple selections are present, deselect all but the primary selection	`Esc`
General (Windows) Delete line under the cursor	`Ctrl` + `D`
General (Windows) Undo last change	`Ctrl` + `Z`
General (Windows) Redo the last undone change	`Ctrl` + `Y`
General (Windows) Undo the last change to the selection, or if there are no selection-only changes at the top of the history, undo the last change	`Ctrl` + `U`
General (Windows) Redo the last change to the selection, or the last text change if no selection changes remain	`Alt` + `U`
General (Windows) Move cursor to the start of the document	`Ctrl` + `Home`
General (Windows) Move cursor to the end of the document	`Ctrl` + `End`
General (Windows) Move cursor to the start of the line	`Alt` + `←`
General (Mac) Move to the start of the text on the line, or if we are already there, go to the actual start of the line (including whitespace)	`Home`
General (Windows) Move cursor to the end of the line	`Alt` + `→`
General (Mac) Move the cursor up one line	`↑`
General (Mac) Move the cursor down one line	`↓`
General (Mac) Move the cursor up one screen, and scroll up by the same distance	`Page Up`
General (Mac) Move the cursor down one screen, and scroll down by the same distance	`Page Down`
General (Mac) Move the cursor one character left, going to the previous line when hitting the start of line	`←`
General (Mac) Move the cursor one character right, going to the next line when hitting the end of line	`→`
General (Windows) Move to the left of the group before the cursor. A group is a stretch of word characters, a stretch of punctuation characters, a newline, or a stretch of more than one whitespace character	`Ctrl` + `←`
General (Windows) Move to the right of the group after the cursor	`Ctrl` + `→`
General (Mac) Delete the character before the cursor	`↑ Shift` + `⬅ Backspace`
General (Mac) Delete the character after the cursor	`Del`
General (Windows) Delete to the left of the group before the cursor	`Ctrl` + `⬅ Backspace`
General (Windows) Delete to the start of the group after the cursor	`Ctrl` + `Del`
General (Mac) Auto-indent the current line or selection	`↑ Shift` + `⭾ Tab`
General (Windows) Indent the current line or selection by one indent unit	`Ctrl` + `]`
General (Windows) Dedent the current line or selection by one indent unit	`Ctrl` + `[`
General (Mac) If something is selected, indent it by one indent unit. If nothing is selected, insert a tab character	`⭾ Tab`
General (Mac) Insert a newline and auto-indent the new line	`⤶ Enter`
General (Mac) Toggle the overwrite flag	`Insert`
General (Windows) Not defined by the core library, only referred to in key maps. Intended to provide an easy way for user code to define a save command	`Ctrl` + `S`
General (Windows) Find	`Ctrl` + `F`
General (Windows) Find next	`Ctrl` + `G`
General (Windows) Find previous	`↑ Shift` + `Ctrl` + `G`
General (Windows) Replace	`↑ Shift` + `Ctrl` + `F`
General (Windows) Replace all. Not defined by the core library, but defined in the search addon (or custom client addons)	`↑ Shift` + `Ctrl` + `R`
General (Mac) Select all	`⌘ Cmd` + `A`
General (Mac) Emacs-style line killing. Deletes the part of the line after the cursor. If that consists only of whitespace, the newline at the end of the line is also deleted	`Ctrl` + `K`
General (Mac) Delete line under the cursor	`⌘ Cmd` + `D`
General (Mac) Delete the part of the line from the left side of the visual line the cursor is on to the cursor	`⌘ Cmd` + `⬅ Backspace`
General (Mac) Delete the part of the line from the cursor to the right side of the visual line the cursor is on	`⌘ Cmd` + `Del`
General (Mac) Undo last change	`⌘ Cmd` + `Z`
General (Mac) Redo the last undone change	`↑ Shift` + `⌘ Cmd` + `Z`
General (Mac) Redo the last undone change	`⌘ Cmd` + `Y`
General (Mac) Undo the last change to the selection, or if there are no selection-only changes at the top of the history, undo the last change	`⌘ Cmd` + `U`
General (Mac) Redo the last change to the selection, or the last text change if no selection changes remain	`↑ Shift` + `⌘ Cmd` + `U`
General (Mac) Move cursor to the start of the document	`⌘ Cmd` + `↑`
General (Mac) Move cursor to the start of the document	`⌘ Cmd` + `Home`
General (Mac) Move cursor to the end of the document	`⌘ Cmd` + `End`
General (Mac) Move cursor to the end of the document	`⌘ Cmd` + `↓`
General (Mac) Move cursor to the start of the line	`Control` + `A`
General (Mac) Move cursor to the end of the line	`Control` + `E`
General (Mac) Move the cursor to the right side of the visual line it is on	`⌘ Cmd` + `→`
General (Mac) Move the cursor to the left side of the visual line it is on. If this line is wrapped, that may not be the start of the line	`⌘ Cmd` + `←`
General (Mac) Move the cursor up one line	`Control` + `P`
General (Mac) Move the cursor down one line	`Control` + `N`
General (Mac) Move the cursor up one screen, and scroll up by the same distance	`↑ Shift` + `Control` + `V`
General (Mac) Move the cursor down one screen, and scroll down by the same distance	`Control` + `V`
General (Mac) Move the cursor one character left, going to the previous line when hitting the start of line	`Control` + `B`
General (Mac) Move the cursor one character right, going to the next line when hitting the end of line	`Control` + `F`
General (Mac) Move to the left of the group before the cursor. A group is a stretch of word characters, a stretch of punctuation characters, a newline, or a stretch of more than one whitespace character	`⌥ Option` + `←`
General (Mac) Move to the right of the group after the cursor	`⌥ Option` + `→`
General (Mac) Delete the character before the cursor	`Control` + `H`
General (Mac) Delete the character after the cursor	`Control` + `D`
General (Mac) Delete to the left of the group before the cursor	`⌥ Option` + `⬅ Backspace`
General (Mac) Delete up to the end of the word after the cursor	`⌥ Option` + `D`
General (Mac) Delete to the start of the group after the cursor	`Control` + `⌥ Option` + `⬅ Backspace`
General (Mac) Delete to the start of the group after the cursor	`Alt` + `Del`
General (Mac) Indent the current line or selection by one indent unit	`⌘ Cmd` + `]`
General (Mac) Dedent the current line or selection by one indent unit	`⌘ Cmd` + `[`
General (Mac) Swap the characters before and after the cursor	`Control` + `T`
General (Mac) Not defined by the core library, only referred to in key maps. Intended to provide an easy way for user code to define a save command	`⌘ Cmd` + `S`
General (Mac) Find	`⌘ Cmd` + `F`
General (Mac) Find next	`⌘ Cmd` + `G`
General (Mac) Find previous	`↑ Shift` + `⌘ Cmd` + `G`
General (Mac) Replace	`⌘ Cmd` + `⌥ Option` + `F`
General (Mac) Replace all. Not defined by the core library, but defined in the search addon (or custom client addons)	`↑ Shift` + `⌘ Cmd` + `⌥ Option` + `F`