# Visibility of a single master checkbox

{% hint style="info" %}
Availability of the functionality depends on the license and may not be available in all deployments.
{% endhint %}

In selected implementations, the ability to define multiple master checkboxes is not supported ([Multiple master checkboxes in the statements component](/documentation/documentation-en/budowanie-aplikacji/interfejs-uzytkownika/formularze/biblioteka-komponentow-bazowych/7-komponenty-specjalne/oswiadczenia-statements/wiele-master-checkboxow-w-komponencie-oswiadczen.md)), but it is possible to control the visibility of the single master checkbox. This is done using the List editor **of masterCheckboxes** (section **Basic properties**), which allows defining a single-item list:

![Figure 1. Editor view with the master checkbox visibility option set](/files/4c88504687c98a79d7500d501c622b797b0c80b7)

When the visibility condition shown in the example (`visibleCondition`) evaluates to `false`, the master checkbox is hidden; whereas 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.


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