# Timeline editing > Edit on Muvomi's multitrack timeline: tools, cutting and trimming, tracks, markers, speed, nests, multicam, scene detection and auto reframe. **Where:** Video editor › AI mode: Off The timeline appears when **AI mode** is off. It works like Adobe Premiere Pro’s: video tracks are stacked with the topmost drawn over the others, audio tracks sit below, and most Premiere keys do the same thing here. A new edit starts with three tracks: **V1** for pictures, **A1** for sound, and **V2** for titles over the picture. > **Tip:** Shortcuts below use Mac keys. On Windows, use Ctrl for ⌘ and Alt for ⌥. Press ? in the editor for the full list, or see [Keyboard shortcuts](https://docs.muvomi.com/reference/keyboard-shortcuts/). ## Tools | Tool | Key | What it does | | --- | --- | --- | | **Selection** | V | Drag a clip to move it (onto another track of the same kind, too). Drag an edge to trim. ⇧\-click or ⌘\-click adds to the selection. | | **Track select forward** | A | Select everything from the click to the end. ⇧\-click selects on one track only. | | **Ripple edit** | B | Trim an edge and close or open the gap behind it. | | **Rolling edit** | N | Move the cut between two touching clips. | | **Rate stretch** | R | Drag an edge to change the clip’s speed so it fits the new length. | | **Razor** | C | Click a clip to cut it there. ⇧C cuts across all tracks. | | **Slip** | Y | Change which part of the recording plays, without moving the clip. | | **Slide** | U | Move the clip while its neighbours adjust around it. | Also in the toolbar: **Snapping** (S), **Linked selection**, **\+ Video track**, **\+ Audio track**, the playhead’s timecode, and zoom (-, =, and \ to fit the whole edit). ## Cut and trim - **Split at the playhead:** ⌘K cuts the targeted tracks (or every unlocked track if none is targeted). ⇧⌘K cuts all tracks. The **Clip** tab also has **Split at playhead**. - **Trim to the playhead:** Q ripple-trims the clip’s start to the playhead; W trims its end. - **Trim by frames:** with a clip edge selected, ←/→ trims one frame and ⇧←/→ one second. - **Nudge a clip:** ⌥←/→ moves it one frame, with ⇧ five frames. - **Delete:** Delete leaves a gap; ⇧Delete ripple-deletes and closes it. > **Note:** S turns snapping on and off; it doesn’t split. Split with ⌘K or the Razor. ## Tracks Each track’s header has a target button (**V1**, **A1**…), its name (double-click to rename), and buttons to hide (video), **Mute**, **Solo** and **Lock** it. Targeted tracks are the ones that receive pastes, splits, inserts, lifts and extracts. The **⋯** menu on a track moves it up or down, adds tracks, records a voiceover onto an audio track, or deletes the track and its clips. Drag the grip to change a track’s height; ⌘= and ⌘- change all tracks. ## Markers - M adds a marker at the playhead. - ⇧M goes to the next marker, ⇧⌘M to the previous. - Click a marker to give it a **Name**, a **Length**, a **Colour** and a **Note**, or to remove it. ## In and out points Mark a range with I (in) and O (out), or X to mark the chosen clip. ⌥X clears them; ⇧I and ⇧O jump to them. - ; **lifts** the range, leaving a gap. - ’ **extracts** the range, closing the gap. You can also export just the in-to-out range. See [Exporting](https://docs.muvomi.com/edit/exporting/). ## The clip menu Right-click a clip for: - **Cut**, **Copy**, **Paste attributes…** (copy motion, opacity, crop, volume, colour, speed or effects from one clip to others), **Duplicate** - **Apply default transitions**, **Turn off / Turn on** - **Link / Unlink**, and **Unlink: separate its sound** to put a video’s sound on its own audio track - **Group** and **Ungroup** - **Speed and duration…**, **Audio gain…** - **Add frame hold**, **Reverse speed**, **Warp Stabilizer** - **Nest**, **Create multi-camera source sequence…** - **Scene edit detection…**, **Auto reframe sequence…** - **Ask AI about this frame** - **Ripple delete** and **Delete** ## Speed **Speed and duration…** (⌘R) sets a clip’s speed from 10% to 1600%, with an option to move what follows with it. **Reverse speed** plays the clip backwards. For speed that changes over time, use **Time Remapping** in **Effect Controls**: add keyframes to the speed line, choose a ramp (sudden, linear, ease in, ease out, ease in and out), and add frame holds or reverse segments. A remapped clip’s sound plays only where it runs at 100%. **Warp Stabilizer** (in **Effect Controls**) smooths shaky footage; set its **Smoothness** and press **Stabilise**. Reverse speed and Warp Stabilizer are free. ## Nests and multicam **Nest** turns the chosen clips into one clip that holds a small edit. Double-click it (or **Open nest**) to edit inside; **Un-nest** puts the clips back. **Multicam** lets you cut between several cameras of the same moment: 1. Choose 2 to 9 video clips (and any separate audio recordings), right-click, and choose **Create multi-camera source sequence…** 2. Order the cameras and choose how to sync them: **Audio** (line up what the cameras heard) or **In points** (each clip’s first frame is the same moment). 3. Play the edit and press 1–9 to cut to that camera. ⇧0 or **Multi-camera** shows every camera at once. Captions, audio cleanup, voiceover, music and brand kits work on the whole edit, so close a nest to use them. ## Scene edit detection Right-click a video clip and choose **Scene edit detection…** to find where the shot changes. Tick **Apply a cut at each detected cut point**, **Generate clip markers at each cut point**, or both, then press **Analyze**. It finds up to 24 scene changes per clip, and it’s free. ## Auto reframe **Auto reframe sequence…** changes your edit’s format, for example from 16:9 to 9:16, and keeps each clip’s subject in frame with position keyframes you can adjust afterwards. 1. Right-click a clip and choose **Auto reframe sequence…** 2. Choose the new **Format**, what to **Follow** (*“the speaker”*, *“the red car”*), the **Motion** (slower, default, faster) and which **Clips**. 3. Check the price, then press **Reframe**. It handles up to 10 clips and about 3 minutes of footage at a time, and follows one point per clip. It costs 10 credits for every 30 seconds started of each clip it follows; a clip it can’t read isn’t charged. ## History and versions - **Undo** and **Redo** (⌘Z and ⇧⌘Z) go back and forward up to 100 steps. Dragging a value is one step, and a whole AI answer is one step. - **History** (left tab) lists every change since you opened the edit. Choose a step to go back to it. - **Changes** (left tab) lists the changes made by the AI and the audio tools, each with its own **Undo**. - **Versions** (header) keeps the 50 most recent saved versions. **Restore** one, or **Download backup**. Restoring makes a new version, so nothing is lost. ## Troubleshooting | You see | What to do | | --- | --- | | *Choose a clip first.* | Select a clip on the timeline. | | *Put the playhead over a clip first.* | Move the playhead onto the clip you want to change. | | *Mark an in point (I) and an out point (O) first.* | Set a range before lifting or extracting. | | *Choose media in the Media panel first.* | Click a file in **Media** before using , or .. | | *Sound goes on an audio track.* / *Pictures go on a video track.* | Drop the clip on a track of the right kind. | | A change is refused | The track may be locked. Unlock it in the track header. |