By default the "Edit" icon is disabled 
. To edit a video, you have to select one file in file list. When an item is selected, you can click the “Edit” icon 
on the tool bar of main interface to edit selected file in Video Edictor window. In Video Editor there are eight sections: Trim, Crop, Image/Video Watermark, Text Watermark, Effect, Audio Replace, Vertical Flip, Horizontal Flip and Volume.
Trim: Cut selected video and remain desired duration only.
You can trim the video through three methods:
Method 1: Trim video with triangle button.
Drag the triangle button under the preview window to the mark the starting point and the ending point.
Method 2: Trim video with Left Square Bracket and Right Square Bracket button.
Click the Left Square Bracket button under the preview panel, when the video plays to the frame you want to set as the starting point; and click the Right Square Bracket button when the video plays to the frame you want to set as the ending point.
Method 3: Trim video with exact value.
Under the Trim tab, you can enter value in the box for the starting point and click the Set button to view the effect.
Crop: With the "Crop" function, you can eliminate areas of the video to emphasize a particular focal point within the frame such as highlighting a character by removing ancillary imagery or removing unwanted backdrops. This is also a great way to get rid of letterbox black bars along the top and bottom of the screen on mobile devices.
There are three ways cut off the unwanted parts of the video.
1. Crop video by dragging cropping frame
Move your mouse cursor onto one of the eight small adjustment boxes on the cropping frame (the dashed line) and drag the crop frame to crop the video. The cropped result will be shown on the Output Preview at the same time
2. Crop video by setting the values
There are four crop values on the bottom of the crop window: Left, Top, Width and Height. You can set each value to crop your video in different position and size.
3. Crop video by dragging the scroll bar
Under the four crop values: Left, Top, Width and Height, you will find four scroll bars for you to adjust the value to locate the position quickly.
* Keep Original Aspect Ratio
If the "Keep Original Aspect Ratio" option is checked, the video will keep the cropped aspect ratio and adding borders if necessary during playing. Otherwise, the video will stretch the width or height to meet the screen.
Reset: Click to reset to default values.
Text Watermark: Add text watermark to selected video clip.
Click button "Text Watermark" to start adding text watermark to video file.
1. First, please click on "Text Watermark", then check option "Enable" to edit text watermark.
2. Type the text you want to use as watermark in text watermark area.
3. Edit the text with different effect by adjusting font, color, size, style, strikeout, underline, and transparence.
4. Adjust the values of "Left" and "Top"or the drop-down scroll bar of "Left" and "Top" to set the position of text watermark
5. If you want to apply the text logo to all of your added videos in the filelist at the same time, you can click "Apple to All" button.
Image/Video Watermark: Click the "Image/Video Watermark" button to come into the image/video watermark editing window. You can add image logo to your video for protecting self-created movie copyright or add a video to your video clips for enjoying a video-in-video effect.
1. Check option "Enable" to edit image or video watermark.
2. Click button "Browse" to specify the image or video file you want to use.
3. Set the image position by dragging the slider bars of "Left" and "Top" options, or enter the values into the two "Left" and "Top" boxes.
4. Resize the width and height by dragging the slider bars of "Width" and "Height" or entering the values.
5. You can click "Apply To All" to get all your video files added the image/video watermark together.
Effect: Click "Effect" button, you can adjust the effects by adjusting the following parameters. After adjusting the effect of your videos, you can click "Apply To All" to get all your video files applied to the changed effect.
Brightness: Drag the Brightness adjusting bar to adjust the brightness of the video.
Contrast: Drag the Contrast bar to adjust the contrast of the video.
Saturation: Drag the Saturation bar to adjust the saturation.
Volume: Drag the Volume slider to adjust the volume of the audio.
Effect: Choose a special effect from the Effect drop-down list for the video. There are many available choices including simple gauss blur, simple laplacian sharpen, gray, flip color, invert, aged film, and None.
Deinterlacing: If there are some stripes on the picture, you can check this option to make a better picture effect.
Apply To All: Get all your selected video files in the file list applied to the changed effect.
Reset: Click to reset to default values.
Audio Replace: The “Audio Replace” feature enables you to add audio to source video file so that you can replace the original audio track with favorite background music or funny dubbing.
1. Click "Audio Replace" button, and check "Enable" option, then hit the browse button to select the audio file you want to add.
2. Make sure the checkbox for "Loop" is ticked, if you want the audio to play continuously when the new audio is shorter than the video.
Accepted audio file format includes *.mp3, *.aac, *.ac3, *.wma, *.m4a, *.wav, etc.
Besides, there are some user-friendly control buttons for you to preview and edit selected video file conveniently. Please refer to the tool bar below.
Play/Pause: Click to start playing the current video or pause the playing.
Stop: Click to quit playing video.
Left square bracket: Click to set the starting time for trimming.
Right square bracket: Click to set the ending time for trimming.
Reset: Click to reset to default values.
Volume slider: Drag to adjust the volume ranges from 0% to 400% of the original volume.
Horizontal Flip: Click to flip the image horizontally.
Vertical Flip: Click to flip the image vertically.
