The current underline interaction (within the software and Chrome browser plug-in) is a floating window menu that immediately appears above or below after selecting a text for the user to select some actions. This method of interaction affects the reading experience for users who are accustomed to “reading while scrolling” with a mouse. The floating window menu that appears immediately after the line is drawn will obscure the text content and affect the continuity of reading.

For the optimization method, it is recommended to refer to the cross-marking interaction of the Chrome plug-in Memowise (Figure 3 and Figure 4). After selecting the text with the mouse, press the shortcut key to draw the line, and then perform the next operation.