Application Usage
Modern word processing applications operate in insert mode by default, but can still be switched to overtype mode by pressing the Insert key. However, the cursor generally does not change into the letter-surrounding box seen on old text-based systems. Instead, an "OVR" indicator on the status bar is highlighted. This is difficult to notice, so other text editors retain the original cursor change in addition to the indicator.
The Insert key, when pressed along with Control or Shift, can also be used to copy or paste in Microsoft Windows. This behavior comes from the Common User Access standard.
Screen reading software use the insert key as hotkeys for reading text, speaking formatting information, or opening the screen reader's configuration menu or window.
Read more about this topic: Insert Key
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