The Alerts options let you decide when you want to be notified of a Caps or Num Lock change. You can also be notified when you press the Insert key. Just check the boxes that you want to be notified of.

NOTES: 

• Windows toggles the Insert key status for each application individually. It is not a system-wide toggle (as are Caps and Num Lock).
• For example, Microsoft Word may have Insert toggled ON, while WordPad has insert toggled OFF. Pressing the Insert key in this situation will turn Insert OFF in Microsoft Word, and will turn Insert ON in WordPad.
• Therefore, Toggler cannot alert you to when the Insert status is being toggled - it can only alert to the fact that it has been pressed.
• Toggler fixes a bug in Windows that allows the Insert key to toggle on and off very quickly when you hold it down.
  • To demonstrate this behaviour, start Microsoft Word while Toggler is not running, note the Insert key status by looking for OVR in the status bar, and then hold down the toggle key for a few seconds. You should see the OVR text in the status bar start to flicker as the Insert mode is toggled on and off very quickly. Depending on how long you hold the Insert key down, the OVR status may or may not be present when you let go of the key. This is obviously not the correct behaviour.
  • Now, start Toggler, and try the experiment again. You will notice that Toggler only allows the Insert key to be pressed once. Therefore, no matter how long you hold the key down, it will always do what you expect it to do.