Where can I find the relevant settings for ‘suggestion for xx’ icon ？

[Qyc]

Where can I find the relevant settings for this icon?

And what should I do if I want to add this feature to the Assignment group as well?

[Brad Bowman]

This is enabled on STRING fields by right-clicking on the field label and choosing Configure Dictionary.  In the tab named "Choice List Specification" select Suggestion in the Choice field.  Whatever 'choice' records are added to the Related List will appear as suggestions.

To add this to the Assignment group field, maybe something like this replication will work, and was done for the Assigned to field?

https://www.servicenow.com/community/developer-blog/quot-suggestion-quot-tool/ba-p/2292361 

[Qyc]

Thank you for your answer!

But I think it's different from the "suggestion" after the Short description, it's related to Predictive Intelligence. In Configure Dictionary, it did not select 'choice', but still displayed the 'suggestion' icon?

[Jan Spurlin]

I am not 100% sure on this - but here is where I would start.

The Suggestion icon is from predictive intelligence.

Navigate to Predictive Intelligence > Similarity > Solutions Definitions

There is a record in there for the Assigned to field on an issue

Name: Similarity Solution Definition for Assigned To for Issue

-- I think you need to set up one of these records for the Assignment group.

[Qyc]

You're absolutely right.
I can be pretty sure that this definition is for it.
But what puzzles me is that there is no field in the definition that mentions "assign to" other than the Label.
So I'm guessing that when Snow set the "assign to" field in the form, he called this training result somewhere, but I couldn't find it.