Adding markers/highlight to graph

hi all,

 well i have three different scatter plots in same window now i want to take values input from user and highlight those values in these plots .. but not sure how to do this..!!
please help..!!

Answer 1

[Fangjun Jiang]

If the values input from the user are actual data points in the scatter plot, can't you just scatter plot those values again and use a different color?