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There are many controls you can use in your app. Text input, Slider, or Timer (with which you can build animations) are just a few examples. Use them to interact with a user in multiple ways: display information, gather some data, or even record a video or take a picture. All controls are under the “Insert” ribbon tab and grouped into categories (Text, Controls, Media etc). Take 10 minutes to discover all the controls in PowerApps. In most cases reading the control label is enough to get the general context of it. However, bear in mind some controls are more complex (eg. gallery or forms).
Other great things about controls are their properties that are for customization. Want this label text to be read? No problem! You don’t like those rounded corners of a button? Sure thing, I don’t like it either. Properties extend the capabilities of the controls. Using them you can use control in multiple ways and in different contexts.