# Template Images

macOS can use an image as a template image, which means it automatically adapts to the control it is part of.

For this to work, an image has to be pure black/grayscale and transparent. On a dark control background, the image is automatically drawn white while on a light background it is drawn black.

{% hint style="warning" %}
This does not work inside of a paint event automatically.\
Instead, use the [Template](/add-ons/cstruecolors/documentation/appkitaddition.md#template-extends-s-as-pushbutton-scaling-as-nsimagescaling-nsimagescaling-proportionallyupordown-position-as-nscellimageposition-nscellimageposition-imageleft-assigns-pic-as-picture) methods of the AppKitAddition to insert a picture as a template into the supported controls.
{% endhint %}


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