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In this topic, we look more closely at the generated app - reviewing the screens and controls that define the app's behavior. We won't go through all the details, but seeing more about how this app works will help you to build your own apps. In a later topic, we'll look at the formulas that work with screens and controls.
A control is simply a UI element that has behaviors associated with it. Many controls in PowerApps are the same as controls that you've used in other apps: labels, text-input boxes, drop-down lists, navigation elements, and so on. But PowerApps has more specialized controls like Galleries (which display summary data) and Forms (which display detail data and enable you to create and edit items). And also some other really cool controls like Image, Camera, and Barcode. To see what's available, click or tap Insert on the ribbon, and then click or tap each of the options in turn, Text through Icons.
Each of the three app screens has a main control and some additional controls. The first screen in the app is the browse screen, named BrowseScreen1 by default. The main control on this screen is a gallery named BrowseGallery1. BrowseGallery1 contains other controls, like NextArrow1 (an icon control - click or tap it to go to the details screen). There are also separate controls on the screen, like IconNewItem1 (an icon control - click or tap it to create an item in the edit/create screen).
PowerApps has a variety of gallery types so you can use the one that best suits your app's layout requirements. You will see more ways to control layout later in this section.
Next is the details screen, named DetailScreen1 by default. The main control on this screen is a display form named DetailForm1. DetailForm1 contains other controls, like DataCard1 (a card control, which displays the flooring category in this case). There are also separate controls on the screen like IconEdit1 (an icon control - click or tap it to edit the current item on the edit/create screen).
There are lots of gallery options, but forms are more straightforward - it's either an edit form or a display form.
The third screen in the app is the edit/create screen, named EditScreen1 by default. The main control on this screen is an edit form named EditForm1. EditForm1 contains other controls, like DataCard8 (a card control, which allows you to edit the flooring category in this case). There are also separate controls on the screen like IconAccept1 (an icon control - click or tap it to save the changes you made on the edit/create screen).
Now that you have a sense of how the app is composed of screens and controls, we'll look at how you customize the app in the next topic.