r/tourbox

I recently added the tourbox workspace to my iPad. I wanted to add the sub view back into my layout and did so through the window tab. But now when I try to draw on the canvas sub view just disappears??? It also disappears when I click on it through the little side menu as well. How do I make it stay there permanently?

Edit: I use version 5.1.4

I'm trying to use tourbox for 3d modeling and drafting but Revit shortcuts are two keys (i.e MV for move). Have anyone used tourbox for applications like Revit and sketchup? How did you fix your presets?