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The blinking of the text cursor is usually temporarily suspended when it is being moved; otherwise, the cursor may change position when it is not visible, making its ___location difficult to follow.
The concept of a blinking cursor can be attributed to Charles Kiesling Sr. via US Patent 3531796,<ref>{{cite web |last1=Kiesling |first1=Charles |title=US Patent 3531796: Blinking cursor for
Some interfaces use an underscore or thin vertical bar to indicate that the user is in [[insert mode]], a [[mode (user interface)|mode]] where text will be [[insert key|inserted]] in the middle of the existing text, and a larger block to indicate that the user is in [[overtype]] mode, where inserted text will overwrite existing text. In this way, a block cursor may be seen as a piece of selected text one character wide, since typing will replace the text ''in'' the cursor with the new text.
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====I-beam pointer====
[[File: I-beam pointer.
The I-beam pointer (also called the I-cursor) is a cursor shaped like a [[serif]]ed capital letter ''I''. The purpose of this cursor is to indicate that the text beneath the cursor can be highlighted and sometimes inserted or changed.<ref>[http://www.computerhope.com/jargon/i/ibeam.htm ComputerHope.com]</ref>
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