If you want users to change column visibility at runtime, enable the Column Chooser. Set the columnChooser.enabled property to true. Note that you can make sure that certain columns always stay visible. To do so, set the columns.allowHiding property to false.
To open the column chooser, users should click the button in the toolbar above the TreeList. The way users show and hide columns depends on the columnChooser.mode:
Users drag and drop column headers to and from the column chooser.
Users select and deselect checkboxes with column names.
If the allowSearch property is set to true, users can search through column names. In this demo, use the checkbox below the TreeList to toggle this feature.
To hide a column in code, set the columns.visible property to false.