On mobile, you can toggle AR mode by selecting the AR icon on the top right
Start by pointing the camera at a surface around you when the app detects the surface it will display blue dots on the surface
Tap on these dotted surfaces to place the model
If you like reposition or rotate the model after placement you can go into adjustment mode using the button on the right bottom corner. As long as this mode is active your tools are deactivated and a swipe in your screen will rotate the model around it's centre.
You can also scale the model down or up using a pinch guesture or use the predefined architectural scales by expanding the scale button.
You can get out AR mode by pressing on the AR button on the top ribbon again (icon next to the section mode)
Editing and creating geometry is also possible in AR (experimental) we would love to hear your feedback on what editing feature you think are most useful in Augmented Reality.