Numeric Value - Offline value

Numeric Value - Offline value

Good afternoon,

My question is regarding the display of the numeric value of a variable, currently when i check the display status of the variable by default we have a red square on the top right position.
We have a customer that is requesting the value to show a symbol when the diver variable is offline example>
Online: 1000 V
Offline: ***** V

Is this possible?, and if so, how will be the best way to configure this.

Best regards,