How do I remove the "Light Blue Color Block" from a Writer Document?

[Eran]

Hello everyone,

I was working w/ a Writer Document (.odt), when suddenly part of a word became a “Light Blue” color. I’ve never seen this occur before, so I have no idea what combination of buttons I hit to accidentally create this.

I am certain it is not a Highlight Color, or a Background Color b/c I am familiar w/ those functions and tried those tools.
The file is attached.

Task List = Career Skills.odt

Great. Just opened the attachment, and it does not show the error. Ugh.
What on Earth have I done?

Okay, so I closed the file and re-opened it, and now its gone. What the Heck was that about?

[ve3oat]

Fingers. Numerous people have experienced this problem for decades.

[LeroyG]

Most probably this is the result of holding down Shift and pressing Right Arrow or Left Arrow, or Ctrl+someArrow, etc.

To select the characters under the moving cursor, […] hold down the Shift key when you move the cursor.

Source: Navigating and Selecting With the Keyboard.

Tested with LibreOffice 6.4.7.2 (x86); OS: Windows 6.1.

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