Why is full-screen casting unavailable for iPad?

ViewBoard has an aspect ratio of 16:9, but the iPad's aspect ratio is different. Therefore, when the iPad is displayed in proportion to the ViewBoard, black frames will appear on both sides.

Why do I get a black screen when using Vcast and Youtube/Amazon prime/Netflix?

Refer to this FAQ. 

Why can't I cast streaming videos (Netflix, Disney+, etc.) via vCast?

This is due to DRM (Digital Rights Management) protection used by streaming services like Netflix, Amazon Prime, and Disney+. These apps block screen capturing by third-party applications, resulting in a black screen during casting. Solutions:To watch copyrighted streaming content on your ViewBoard, please use one of the following methods: ...

How to use "Screen Mirroring" on iOS devices (iPhone/iPad) to ViewBoard?

Use iOS built-in "Screen Mirroring" for the same network. For cross-subnet connections or if the device is not found, use the vCastSender App with a PIN code. Scope: Devices: iPhone / iPad. Environment: Same Wi-Fi or Cross-Subnet. Scenario A: Device and ViewBoard are on the "Same Wi-Fi" (via AirPlay) Open the iOS [Control Cen...

What iOS versions on iPad allow touch control when screen mirroring to a ViewBoard after a Bluetooth connection is established?

When mirroring the screen to a ViewBoard IFPD using vCastSender iOS, iPads running iOS 18.0 or later support touchback functionality after a Bluetooth connection is established.

Why are black bars on both sides while casting from iPad?

The ViewBoard has an aspect ratio of 16:9, while the iPad's aspect ratio is different. As a result, when the iPad is displayed proportionally on the ViewBoard, black bars appear on both sides.