Thank you for writing to us.
This example shows how to achieve the behavior you described: https://jsfiddle.net/flexmonster/6t9hx5uv/
Does it help?
Also, we kindly ask you to post the questions in English.
How can the field in the toolbar be selected by default? I am now initializing when the query is the flat type of the option, but it only shows two fields by default. I want it to display all fields, how can it be realized?,thank you.
Thank you for your feedback.
Please make sure that you are using the latest version of the component: https://www.flexmonster.com/doc/updating-to-the-latest-version/.
As you can see in the following jsfiddle example: https://jsfiddle.net/flexmonster/6t9hx5uv/3/, you should set an empty slice and all the fields will be selected by default.
Please let us know if you managed to resolve it.