I wanted something to show a program state message while I’m wearing Hololens. That is to add UI > Panel and UI > Text inside the Panel. You will get The Canvas gameobject as a parent object that contain Panel nested inside. Set the Canvas render mode to “World Space”
Then we need to attach Tagalong and Billboard scripts (from HoloToolkit 2017.4.3.0) to the Canvas.
Tagalong will move the Canvas to always be inside the Hololens view. The default setting it will move the Canvas to the border of the Hololens view, not exactly at the view center.
Billboard will change the Canvas orientation to face the Hololens Camera. Set Pivot axis to “free” so that the Canvas can rotate along all x,y,z axes.
It let the Canvas to not come inside Hololens view when moved.
Normally, the Canvas will be around inner border of the view.