Any UI from any apps can be used as the default UI . 
The default UI here serves as the landing page when someone navigates to Joget.

Figure 1: Default UI Selection

In the default installation, an app called "App Center" with the UI named "App Center" is preloaded.

Overall Structure of App Center App

1. In order to edit it, as a Joget administrator, simply navigate to "All Apps" in the admin bar, then click on the "App Center" app.

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   Figure 2: Select App Center in All Apps

2. Then, click on the "App Center" UI to edit.

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   Figure 3: Click on App Center UI in App Composer

3. In the UI Builder, edit the UI menu called "Home".

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   Figure 4: UI menu Home

4. It is a List UI Menu that points to a JSON API named "Published Userviews".

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   Figure 5: It points to a JSON API 

   By defining the content of the form, we can alter the JSON URL. 

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Customizing the App Center's UI 

1. The logo that is displayed in the App Center can be changed under Settings > Theme > Advanced > Home Banner.

   Just upload a logo of your preference to the app's Resources, then copy the new resource's generated hash variable and replace the image source.

   
   
   Figure 6: Custome Logo URL

2. The "Home Banner" and "Custom CSS" can be customized.

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   Figure 7: Home Banner and Custom CSS fields

3. The help guide feature can be disabled, by scrolling to the bottom of the same page.

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   Figure 8: Disable Help Guide Feature Checkbox

Disabling the "help" (Hint/Guide) 

1. To disable the Hint pop-up, edit the App Center UI.

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2. Navigate to Settings.

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3. Under Settings, navigate to "Configure Layout > Configure Theme > Advanced".

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4. Scroll down to the bottom of the page, and check the "Disable help guide feature?" option.

   
   

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   Figure 9: Disable Help Guide Feature Checkbox

5. Then click on "SAVE" to save the UI.

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Related Tutorial

• Apps and the App Center