# Visibility of a single master checkbox

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Availability of the functionality depends on the license and may not be available in all deployments.
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In selected deployments, the ability to define multiple master checkboxes is not supported ([Multiple master checkboxes in the statements component](https://docs.eximee.com/documentation/documentation-en/budowanie-aplikacji/interfejs-uzytkownika/formularze/biblioteka-komponentow-bazowych/7-komponenty-specjalne/oswiadczenia-statements/wiele-master-checkboxow-w-komponencie-oswiadczen)), but it is possible to control the visibility of the only master checkbox. This is done with the List editor **masterCheckboxes** (section **Basic properties**), which allows defining a single-item list:

![Figure 1. Editor view with the master checkbox visibility option set](https://content.gitbook.com/content/2CssJT0zIo4SJQLbSZ6l/blobs/4NJgpVD7SbrEfV3sbOG8/9s_files/image2024-8-5_14-34-34.png)

When the visibility condition shown in the example (`visibleCondition`) evaluates to `false`, the master checkbox is hidden; when it evaluates to `true`or the configuration has not been defined — the master checkbox will be visible. Conditions are not evaluated from within Eximee Designer, so in the application preview the master checkbox will still be visible.