Use Blade when you need a new edit point. Use Trim when the edit point already exists and you need to change where the cut happens. Keep that split in your head and you won't need to memorize every cursor icon in DaVinci Resolve.
Blade divides one clip into separate timeline segments. A normal trim changes an edge. Ripple Trim changes an edge and shifts everything after it. Roll moves the cut between two neighboring clips. Slip changes which source frames appear inside a clip without moving the clip. Slide moves the whole clip while trimming its neighbors, so the timeline length holds.
My rule: if the sentence in my head starts with “split this clip,” I reach for Blade. If it starts with “make this cut earlier, later, tighter, or smoother,” I use a trim operation.
Blade vs Trim: the quick decision table
Forget which tool feels faster for a single click. The question that matters is which parts of the edit Resolve is allowed to change.
| Operation | Best for | Creates a gap? | Changes timeline length? | Needs source handles? |
|---|---|---|---|---|
| Blade | Create a new edit point inside a clip | No, not by itself | No | No |
| Ripple Trim | Shorten or extend a clip and close or open time around it | Usually no; later material shifts | Yes | Yes when extending |
| Roll | Move a cut between two adjacent clips | No | No | Yes on both sides |
| Slip | Choose a different moment inside the same clip position | No | No | Yes |
| Slide | Move a clip earlier or later between its neighbors | No | No | Yes on neighboring clips |
Blade doesn't create empty space. The two pieces still touch at the same frame. A gap shows up only when you move or delete one of them with an operation that leaves time behind. So when someone says "Blade created a gap," they're usually describing what happened after the cut, and Blade itself had nothing to do with it.
What the Blade tool actually does
Blade Edit Mode puts a cut through the clip or clips you target, right where you click. Resolve turns one continuous timeline item into two items that share an edit point. The source media is untouched, the visible timing doesn't change, and the timeline keeps its length. If the playhead is already parked on the frame, Timeline > Split Clips (Command-\, Ctrl-\ on Windows) does the same job without switching modes.
Blade is the right call when you need to isolate a section before you move, delete, disable, retime or add an effect to only part of a clip. It also helps when the spot for a cut is easier to point at than to reach with the playhead. Our guide to splitting a clip in DaVinci Resolve covers the split commands and track behavior in more detail.
Blade gets clumsy when you make two cuts around a pause, select the middle piece, delete it and then close the gap. A ripple trim can usually take out the same unwanted time in fewer steps, with less cleanup.
Blade first when the section needs its own identity
Make a separate segment when you plan to treat that piece differently from the rest of the source clip: muting one phrase, speeding up one action, replacing a short portion, or lifting a reaction shot to another track.
Skip Blade when you only want a tighter edge
If the cut already exists, another split just adds an edit point you don't need. Grab the existing edge and trim it. Fewer edit points make later revisions easier, because you're changing the real boundary and not babysitting extra fragments.
Ripple Trim: remove time and move everything after it
Ripple Trim changes a clip edge and adjusts the timeline around that change. Shorten the outgoing edge and later material moves earlier. Extend it and later material moves later, as long as the source clip has unused frames. Blackmagic's manual is blunt about this: ripple operations are the only trims that change the overall timeline duration.
It's the fastest way to remove a pause, dead air, a late camera move or a clumsy lead-in when the following edit should stay attached. Park the playhead where the keeper starts and press Command-Shift-[ (Ripple Start), or Command-Shift-] at the end of a section; both ripple to the playhead in either mode. Ripple is also the operation most likely to surprise a new editor, because its effect reaches past the clip under the pointer.
Before you ripple, look at every track that has to stay in sync. Dialogue, music, graphics, subtitles and cutaways may need their Sync Locks and track targets set on purpose. With Sync Locks on, long overlapping clips such as a title or a music bed stay in place while you ripple the shots under them. A ripple that's right on V1 can still be wrong for the sequence if an associated title or audio cue gets left behind.
Blackmagic's Edit page overview describes contextual trimming, ripple edits and the dedicated trim editor as part of Resolve's timeline workflow. The practical takeaway is simple: ripple work is allowed to change the duration of the sequence.
Roll: move the cut without moving the sequence
A roll edit moves the boundary between two adjacent clips. One clip gets longer by exactly the amount the other gets shorter. The cut moves, and the combined duration of the pair and the total timeline length stay the same. You don't even need Trim Edit Mode for it: dragging the edit point between two clips rolls it in Selection Mode too.
Use Roll when the structure is right and the handoff isn't. A reaction starts too late, the speaker change feels abrupt, or the motion doesn't line up across the cut. While you drag, a two-up display shows the outgoing and incoming frames, so you can hunt for a better transition without pushing music, graphics or every later edit out of place.
Both clips need unused source material around the edit. If the roll stops, Resolve has probably hit the start or end of one source. That's a media limit, and the tool is working fine.
Slip: keep the clip in place and change the moment inside it
A slip edit keeps the clip's timeline position and duration while moving its source In and Out points together. The neighboring clips stay put. What changes is the part of the source file shown inside the existing slot. In Trim Edit Mode, drag the top middle of the clip; a dashed overlay shows how much media you have to slip through.
Slip is perfect for B-roll that fits the gap but shows the wrong moment. Skip moving the clip and repairing both cuts around it; slip through the source until the action inside the fixed duration works.
Slip needs handles before and after the source range you're using. If the clip already starts at the first available frame, you can't slip any farther that way. Compound clips add another layer to this, so check our compound clips guide when the item on the timeline contains a nested sequence.
Slide: move the clip and let its neighbors compensate
A slide edit moves one clip earlier or later while keeping its own source In point, Out point and duration. Resolve trims the outgoing edge of the clip before it and the incoming edge of the clip after it, and the three-clip span stays the same length. In Trim Edit Mode you get it by dragging the name bar along the bottom of the clip.
Use Slide when the middle clip is right and its timing in the sequence is wrong. A cutaway may need to start earlier without changing the cutaway itself, or a reaction may land better a few frames later while the scene length has to stay fixed.
Slide needs room in both neighboring source clips. When one neighbor runs out of handle, the move stops. If the middle clip needs a different moment, use Slip. If the boundary between two clips has to move, use Roll.
Selection, Trim Edit, and Blade Edit modes
Resolve splits pointer behavior into three common modes. In the standard keyboard layout, A returns to Selection Mode, T opens Trim Edit Mode and B opens Blade Edit Mode. Those are defaults, so your system may differ if someone customized the keyboard map. Hold A or T for a moment and Resolve switches modes only while the key is down.
- Selection Mode: the everyday mode for choosing and moving clips. Dragging a clip edge resizes it and can leave a gap, dragging the edit between two clips rolls it, and the cursor changes with position and modifier keys.
- Trim Edit Mode: turns edge drags into ripples and gives you slip and slide on the clip body. Press U to switch the selected edit between its outgoing side, its center and its incoming side.
- Blade Edit Mode: turns the pointer into a cutting tool so you can add edit points where you click.
Go back to Selection Mode after a run of blade cuts. Slicing a clip by accident while you meant to select it is one of the most common reasons editors find stray edit points later. If the shortcuts don't behave as described, open Keyboard Customization and search for the command names. Our DaVinci Resolve keyboard shortcuts guide explains how to check and change the mapping safely.
Edit page or Cut page?
You can use both pages in the same project. The Edit page gives you detailed track control and the full set of trimming relationships. The Cut page is built for fast source review, compact timeline navigation and context-aware editing.
Blackmagic's Cut page overview highlights Source Tape, dual timelines, Smart Insert, append operations and fast trimming. None of that makes Blade or Trim obsolete. Those tools just cut down how often you have to park the playhead and target a track precisely before an edit.
I prefer the Cut page for finding and assembling material, then the Edit page when the relationships between tracks and edit points need closer control. A beginner doesn't have to pick a side for good. The broader DaVinci Resolve beginner tutorial shows how the pages fit into one workflow.
Why the wrong clip moves, a gap appears, or the trim stops
A gap appeared after cutting
Blade didn't create the empty time. Check whether you deleted a segment with a normal Delete, dragged a piece away, or turned snapping off before moving it. Use Ripple Delete (Forward Delete in the default map) when later material should close the space, or close the gap yourself after checking every track.
The wrong clip or track changes
Check track targeting, the Auto Track Selector controls, linked selection and Sync Locks. A trim can affect more than the visible video edge when linked audio, stacked tracks or protected sync relationships are involved.
The trim reaches a hard stop
You've probably run out of source media. Roll needs frames on both sides of the edit. Slip needs unused frames outside the current source range. Slide needs handles in the neighboring clips. No trim mode can invent frames that don't exist.
The shortcut does something else
Keyboard presets and custom mappings can replace the usual A, T and B keys. Search for Selection Mode, Trim Edit Mode and Blade Edit Mode in Keyboard Customization before you assume the key is fixed.
You cannot find the timeline tools
Make sure you're on the Edit or Cut page. The Color and Fusion pages have different jobs and different controls. Blackmagic posts current project files and training books on its official DaVinci Resolve training page if you want structured practice with the editing pages.
A practical choice for common edits
- Remove a pause and close the time: Ripple Trim the edge, or use Ripple Delete if you already isolated the section.
- Separate one section for an effect: Blade at the start and end of that section.
- Make a reaction start sooner without changing scene length: Roll the cut.
- Keep B-roll in the same gap but show a better moment: Slip the B-roll.
- Move a cutaway earlier while preserving its duration: Slide the cutaway.
- Move a clip and intentionally leave empty time: use Selection Mode and drag it. That's a placement decision, and no trim is involved.
When two operations could reach the same final frame, pick the one that keeps the relationships you already trust. That usually means fewer temporary cuts, fewer cleanup steps and less chance of losing sync.
Final answer: should you use Blade or Trim?
Use Blade to create structure. Use Trim to refine structure. Blade makes a new edit point and leaves timing alone. Ripple Trim changes timing and moves later material. Roll moves an existing cut while keeping duration. Slip changes the source moment inside a fixed clip. Slide moves a fixed clip while its neighbors absorb the change.
If you keep only one question in mind, make it this one: Do I need a new piece, or do I need a better boundary? A new piece calls for Blade. A better boundary calls for Trim.
