CtrlH

CtrlH, also written as Ctrl+H, refers to the keyboard shortcut formed by holding the Control key and pressing the H key. The function it performs is not standardized and depends on the program, platform, and user configuration.

Common uses include: in many text editors and word processors, Ctrl+H opens a Replace or Find and Replace dialog (for example, Notepad, WordPad, and many IDEs use Ctrl+H for Replace); in web browsers such as Google Chrome and Mozilla Firefox, Ctrl+H opens the History page; in some applications it may trigger other actions or remain unbound.

On the command line and in terminals, Ctrl+H is the ASCII backspace control character (BS, 0x08). When received by a terminal, it typically deletes the character to the left of the cursor, functioning like a backspace key; depending on the terminal emulator and software, it may be mapped differently or ignored.

Origin and usage stem from the early days of ASCII control codes and teletype editing. While most modern software uses dedicated keyboard shortcuts or GUI controls, control-key combinations like Ctrl+H persist as legacy editing commands or simple input controls in various environments.

Related context includes Ctrl+F for Find and browser-history shortcuts that use Ctrl+H; exact behavior, however, remains highly context-dependent and can differ across applications and platforms.