Adding Model to a Scene
To add a model to the scene, simply choose the model from the Personal Assets or Company Assets folder, then drag and drop the model into the scene.
How to Scale, rotate and position model
Once you have imported the model, Gizmo mode allows you to change its position, rotate and scale as desired.
Use W,E,R change gizmo modes to translate/rotate/scale. Here are Tips and Shortcuts for navigating the scene.
You can assign/un-assign the Keybindings/Shortcuts under Edit > Preferences > Keyboard Shortcuts.