CheckBox
When you add Checkbox element to the search block initially you will see that there is a Please Add Some Optionsmessage. To configure your checkbox click on the settingsiconon theleft corner.
You will find thecheckbox panelwill appear in a modal.
First you have to choose between eitherMetadata or Taxonomyfrom theData Tabin theCheckBox Panel.

TheAppearance Tabcan be used to change
titlesubtitleCustom Class NameEnter type of viewNo. of options in ColumnsSelect Steps
After you change necessary configuration then it will look similar to the below Snap,
