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:A keyframe allows the user to manipulate a characteristic of an object: for a video the characteristic could be fade to black, or fade between video clips. On the other hand, for audio or music, it could indicate volume fade-in or volume fade-out.
:'''To set a key-frame, point and click the mouse on the video clip, and click the key-frame button on the Marker toolbar'''. In order to change the level of the video, simply '''click and drag the key-frame handle up or down. You can create multiple key-frames in order for fade-ins and fade-outs'''. You can preview the edited video clip to verify the result. Note: The user can always UNDO the editing change by clicking '''EDIT ''' -> '''UNDO''', or press the shortcut keys '''CTRL-z'''.
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<td>[[Image:keyframe1.png|thumb300pxthumb|300px|'''Selection of Keykey-frames''' in video section. ]]</td><td>[[Image:keyframe2.png|thumb|200px|'''KeyframeKey-<br />frame''' Button ]]</td>
<td>[[Image:keyframe3.png|thumb|300px|'''Manipulation of key-frames''' (ie. "fade-to-black") ]]</td>
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:To add the audio clip into the project area, '''simply click and drag the object into the area below the Timeline Ruler'''.
:'''The procedure to cut or manipulate audio tracks is the same as in the "editing video" area above, except you select the cut-points or key-frames in the audio area instead of the video area...'''
===Rendering the Final Product===
:To In order for your video project to run on a media player, or be completed played in YouTube, it must be mixed down into the appropriate file format. '''This process of mixing down several types of media into a single file is referred to as "rendering"'''. :The user needs to provide information pertaining to the file such as:::*Name of file::*Resolution of video (eg. NTSC instead of PAL, 720i, 1080p, etc)::*Type of audio/video encoding scheme[[Image:pitiviRender1.png|thumb|400px| Mixing down or rendering project into single video file format]]Note: For this tutorial, we will be rendering to an AVI file which is considered to be very YouTube Friendly. '''STEPS TO RENDER A VIDEO:'''::#Click on the '''RENDER PROJECT''' button in the Tools toolbar.::#When the Render Project dialog box appears, click '''Choose File and enter an appropriate filename''' (note location for storing file).::#When back in the Render Project dialog box, click '''Modify''', and set "Video Output" to '''480P''', '''720P''' or '''1080p''' (depending on your video resolution preference).::# In '''"Export to - Container"''' change the setting to: '''Avi Muxer [avimux]'''::# '''Click OK to start the rendering process'''.