Firstly, you need to configure a specified widget to make it available for adding. For this, please follow instructions provided in the Widgets Displayingarticle.
Add a widget to a form layout
On the form appeared, select a widget you want to add:
Click on a desired widget from the Available box.
Drag-and-drop or use form buttons to move the widget to the Selected box.
Define a widget position on the form with or buttons. Use splitter elements to create the form structure. You can also drag-and-drop items between heapselect fields, and within a single field, instead of using buttons.
SeeForm Layoutto learn more about form layout configuration.
Configure the options schema
Use the Widget Instance window to specify the widget options. Click on the widget while configuring the layout to call this window.
See Portal widget option to learn more about widget configuring when adding a widget to a page or to a form.
To configure the widget options schema, follow the steps below:
In the Schema Option Values field, enter the widget options in JSON format.
Specify the desired widget option values, otherwise, the default values will be applied: