1. Use the timeline at the bottom of the window to move to the frame at which you want to set your key frame.
2. Either move the viewpoint in the 3D Preview and press "Set Camera", or enter coordinates manually in the camera's parameter window/panel.
3. In the camera's parameter window/panel, next to the position and rotation parameters there is an animation button with an S shape and the letter 'A'. Click this and choose "Set key frame". Do that for both position and rotation.
These features are only available if you have purchased the Animation option.
Unfortunately it is not yet possible to delete individual key frames after they have been created, but you can modify existing keyframes by overwriting them with "Set key frame". You can clear all animation for a parameter with "Delete animation". It is possible to delete individual key frames by editing the project file by hand (similar to XML). This workflow will be significantly improved later this year.
Matt
