TO COPY AND PASTE KEY FRAMES
Delete the Cube and add a Monkey. Go to frame one set up a key frame. Do changes in location and rotation settings. Go to frame 125 and set up another keyframe. Now if you want to copy the key frame at frame 1 and paste it at frame 250 follow the following steps.
To copy/paste keyframes for the same object,go to the Dope sheet, press "A" key to de-select all action points (yellow squares). Then select the action points which corresponds to the key frame you want to copy by right clicking each action point while holding down the "Shift" key.Once you have selected all the desired points press Ctrl+C to copy, go to the key frame where you want to paste then press Ctrl+V. Save the file.Run animation to check for the desired result.
