I'm new to Adobe XD. I'm facing a problem which is I cannot change the value of the viewport through the keyboard and it has to be manually. I mean, when entering a value for the viewport then press Enter the value doesn't change. The only way to change the value is to grip viewport by the mouse and change up or down.
Someone suggested to change "H" to change the viewport value but that changes the height of the page not viewport value.
Thanks for reaching out. Please ensure that the Viewport height value should be less than the "H" value and then try changing it. If it still doesn't work, please share a small video of what exactly is happening at your end? We'll try our best to help you with it.