# Effects, transitions and colour
> Add transitions and effects, animate with keyframes, grade colour with Lumetri Color and scopes, and use masks that follow a moving subject.
**Where:** Video editor › AI mode: Off › Transitions tab and the inspector
Everything on this page is free, and everything can also be done by asking the [editor’s AI](https://docs.muvomi.com/edit/editor-ai/), for example *“Add a cross dissolve between every clip”* or *“Make this scene warmer.”*
## Transitions
Open the **Transitions** tab on the left. Drag a transition onto a cut or a clip’s edge, or choose clips and press **Apply**. Between two clips it plays across the cut; on a free edge it fades from or to nothing.
| Bin | Video transitions |
| --- | --- |
| **Dissolve** | Cross Dissolve, Film Dissolve, Additive Dissolve, Dip to Black, Dip to White |
| **Slide** | Push, Slide, Split, Whip Pan |
| **Wipe** | Wipe |
| **Iris** | Iris Round, Iris Box |
| **Zoom** | Cross Zoom |
**Audio transitions** (bin **Crossfade**): Constant Power, Constant Gain and Exponential Fade.
Click a transition on the timeline to change it in **Effect Controls**: its kind, **Duration** (one frame to 10 seconds, default one second), **Alignment** (centre, start or end at the cut), and for some kinds a **Direction** or edge softness. **Remove transition** deletes it.
**Default transitions.** The star on a transition makes it the default. ⌘D applies the default video transition, ⇧⌘D the default audio transition, and ⇧D both to the chosen clips. Out of the box they’re Cross Dissolve and Constant Power.
> **Note:** A video transition leaves the sound alone. For a smooth sound change too, add an audio transition on the audio clips.
## Effects
Open the inspector’s **Effects** tab (⇧7). Click an effect to add it to the chosen clip, drag it onto a clip, or search and press Enter.
| Group | Effects |
| --- | --- |
| **Blur & Sharpen** | Directional Blur, Gaussian Blur, Sharpen, Unsharp Mask |
| **Channel** | Invert |
| **Color Correction** | Brightness & Contrast, Lumetri Color, Tint |
| **Distort** | Mirror |
| **Image Control** | Black & White |
| **Keying** | Ultra Key (removes a green or blue screen) |
| **Noise & Grain** | Noise |
| **Perspective** | Drop Shadow |
| **Stylize** | Glow, Posterize, Vignette |
| **Transform** | Horizontal Flip, Vertical Flip |
**Lumetri Presets** holds 13 ready-made looks (see [Colour](https://docs.muvomi.com/edit/effects-and-color/#colour)).
**New adjustment layer at the playhead** adds a layer whose effects apply to everything on the tracks below it. Its opacity sets how strong they are.
A clip can carry up to 30 effects. In **Effect Controls**, each effect can be switched off, reset, copied to another clip, reordered or removed.
## Effect Controls and keyframes
Choose a clip and open **Effect Controls** (⇧5):
| Group | Controls |
| --- | --- |
| **Motion** | Position, Scale (5% to 1000%), Rotation, Anchor Point |
| **Opacity** | Opacity, and **Blend Mode**: Normal, Darken, Multiply, Color Burn, Lighten, Screen, Color Dodge, Overlay, Soft Light, Hard Light, Difference, Exclusion, Hue, Saturation, Color, Luminosity |
| **Crop** | Left, Top, Right, Bottom |
| **Volume** | Level, **Clip gain**, fade in and fade out |
| **Panner** | Pan, for sound |
Below them are the clip’s **Time Remapping**, **Warp Stabilizer**, **Opacity masks** and its effects.
**To animate a value:**
1. Move the playhead to where the change should start, inside the clip.
2. Press the stopwatch beside the value (**Animate**) to set the first keyframe.
3. Move the playhead and change the value. A new keyframe is added.
4. Click a keyframe to choose how it moves to the next: **Linear**, **Ease in**, **Ease out**, **Ease in and out**, **Hold**, or a **Custom curve**.
Drag a value sideways to change it (hold ⇧ for bigger steps), or click it to type. The arrows beside it jump between keyframes.
## Colour
Choose a clip and open **Lumetri Color**. The **Clip** tab’s **Color & light** is a quick version with a few looks and sliders.
| Section | What’s in it |
| --- | --- |
| **Basic Correction** | Input LUT (with **Import .cube**), Temperature, Tint, Exposure, Contrast, Highlights, Shadows, Whites, Blacks, Saturation, Vibrance. **Auto** makes a starting correction from the frame. |
| **Creative** | A look and its Intensity, Faded Film, Sharpen, Vibrance, Saturation, Shadow Tint, Highlight Tint, Tint Balance |
| **Curves** | RGB, red, green and blue curves, and the hue curves: Hue vs Saturation, Hue vs Hue, Hue vs Luma, Luma vs Saturation, Saturation vs Saturation |
| **Color Wheels & Match** | Shadows, Midtones and Highlights wheels. **Color Match** matches this clip to another one. |
| **HSL Secondary** | Pick a colour range (for example skin or sky) and correct just that. **Show Mask** shows what’s picked. |
| **Vignette** | Amount, Midpoint, Roundness, Feather |
**The 13 looks:** Cinema, Warm film, Black & white, Teal and orange, Bleach bypass, Faded, Cool, Warm, Golden hour, Moonlight, Noir, Vivid and Sepia.
**LUTs.** Import a 3D `.cube` file up to 12 MB in **Basic Correction**, or upload it to your [Assets](https://docs.muvomi.com/workspace/media-library/).
### Scopes
The **Scopes** tab shows the chosen clip at the playhead as a **Waveform (Luma)**, **Parade (RGB)**, **Vectorscope YUV** or **Histogram**. Scopes read footage and pictures, not titles.
## Masks
Masks limit a clip, or an effect, to part of the picture. They can move over time and follow a moving subject.
1. Choose a clip and open **Effect Controls**. Find **Opacity masks**.
2. Press **Ellipse**, **Rectangle** or **Pen**. With the Pen, click to add points (drag to curve), and click the first point or press Enter to close.
3. Adjust the mask on the preview, and set its **Mask feather**, **Mask opacity**, **Mask expansion**, **Inverted** and **Mode** (Add, Subtract, Intersect).
4. To animate it by hand, press the stopwatch on **Mask path** and change the shape at different times.
5. To follow a subject, press **Track mask**, choose a **Tracking method** (position; position and scale; or position, scale and rotation), then **Forward** or **Backward**.
A clip can have up to 10 masks. Tracking works on footage (not still pictures), up to 20 seconds at a time; track again from where it stopped to go further. Mask tracking is free.
> **Tip:** Ask the AI: *“Blur the face with a mask”* or *“Vignette the speaker with an ellipse.”*
## Troubleshooting
| You see | What to do |
| --- | --- |
| *Choose a clip first, or drag the effect onto a clip.* | Select a clip before adding an effect. |
| *Sound has no picture for video effects.* | Video effects and colour work on clips with a picture. |
| *The playhead is outside this clip.* | Move the playhead into the clip before setting keyframes. |
| *This is a 1D LUT.* | Import a 3D LUT (a `.cube` file with `LUT_3D_SIZE`). |
| *…could not be tracked: there is nothing in it to follow here.* | Draw the mask over something with clear edges, or move the playhead. |
| *The chosen clips have no sound to cross.* | Audio transitions go on clips with sound. |