向自定义表单添加复选框的最简单方法是单击"字段选择器"上的"新建"按钮，然后创建一个新的"是/否"字段。然后，将该字段拖动到要显示复选框的自定义表单页面。然后，您应该可以从用户定义的文件夹列表中添加
字段到自定义视图。 

The easiest way to add a check box to a custom form is to click the New button on the Field Chooser and create a new Yes/No field. Then, drag that field to the custom form page where you want the check box to appear. You should then be able to add the fields to your custom view as well, from the User-defined Fields in Folder list.