Pop out remind on User Interface

[Carrot_WinWin]

Hi Team,

I'm trying to make below scenario: we give user the option to choose what column they want to use, and if they eventually choose 0 column, is it possible to bring a remind on user's interface reminding user that currently no column had being chose, while the workflow won't be blocked to continue? like the user can still click "continue" to complete the following workflow. 

I'm currently trying "Message" tool but seems it either will stop the workflow, or it won't show in the user's interface. 

Eager to get suggestion on this, please help. thank you so much. 

[flying008]

Hi, @Carrot_WinWin 

If you can , Perhaps can use the HTML SDK interface to achieve the desired effect.