Change to full screen view for a VM session: Azure Bastion
This article helps you change the virtual machine view to full screen and back in your browser. Before you work with a VM, make sure you have followed the steps to Create a Bastion host. Then, connect to the VM that you want to work with using either RDP or SSH.
Launch the clipboard tool
During the remote session, launch the Bastion clipboard access tool palette by selecting the two arrows that located on the left center of the session.

Select full screen
Select the Fullscreen button to switch the session to a full screen experience. Once you switch, the session will reinitialize to full screen.

Next steps
Read the Bastion FAQ. Learn how to Copy and paste to and from an Azure VM.