How to save camera angles, save files and preview images
Move around your scene using the space bar and alt/opt left click mouse to find the angle you want to save.
Go to camera angles (camera icon 2nd from top on left toolbar).
Under +Add camera, name your angle and save.
Once saved, move to top taskbar to file - save scene as - in the pop up check the angle you want to save (or select all) - save file - name file - save (select the location you want to save the file).
Go to Save image icon (5th down on left toolbar - cloud icon) and select Create Preview.
Choose the view you want to preview in the pop up and name it. Click on Send.
In the top taskbar, click on file - preview images. Your preview will appear here once it is rendered.