Answer:
Hello there! The reason here is that you accidentally pressed the Insert key on your computer keyboard (the key located above the Delete key). This key has the function of overwriting, meaning when you type a new character, this character will overwrite the character next to the cursor. To fix this, you just need to press that key again once and then check. If there is still no result, you can follow these steps (Only applicable for Word 2007 and later):
Step 1: Open the Options window in Word by: Applies to Word 2007/2010/2013
Click the Office icon in the top left corner of the screen (if the toolbar is not displayed) --> Word Options
Step 2: The Word Options window appears, select the Advanced tab
Step 3: Select Advanced
- To turn off the function of the Insert key --> uncheck the 2 lines of text Use the Insert key to control overtype mode and Use overtype mode.
- To turn on the function of the Insert key --> mark the check boxes for the 2 lines Use the Insert key to control overtype mode and Use overtype mode.
Select OK to complete the task
Wishing you success!