修剪Trimming
学习目标LEARNING OBJECTIVES
学完你能说清修剪（Trimming）是什么、余量（handles）从哪来，并在 Selection 模式下拖动片段边缘精确调整入点和出点。
概念说明CONCEPTS
修剪（Trimming）是片段进了时间线之后，继续调整其入点和出点的过程——粗剪解决"顺序对不对"，修剪解决"每一刀落在哪"，它被称为剪辑师最重要的技能。
- 只调边界：修剪不切断片段、不产生新片段，只让已有片段变长或变短。
- 余量定上限：片段两端没用完的素材叫余量（handles），拖动时以白色描边显示——余量耗尽就再也拉不长。
- 两种模式分工：Selection 模式（
A）拖边缘改时长，直观上手；Trim Edit 模式（T）解锁波纹、滚动、滑移、滑动（见 修剪编辑模式）。 - 多点可同剪：
Cmd/Ctrl加选多个编辑点一起拖，键盘微调比鼠标更精确。
操作步骤STEPS
- 确认时间线处于 Selection 模式（按
A，工具栏箭头按钮高亮） - 把指针移到片段左边缘或右边缘，指针变成修剪图标
- 按住边缘拖动：向外拖拉长片段，向内拖缩短片段
- 看提示框中的帧数偏移（如
+00:20），到位后松手 - 把播放头移回编辑点之前，回放检查衔接是否自然
练习PRACTICE
- 把任意片段的出点向内拖短约 1 秒再拖回，观察白色余量描边的变化。
- 把一个片段整体右移留出空隙，再拖动后一片段的左边缘把它拉长补回空隙。
常见问题FAQ
修剪和 Blade 切断是一回事吗？
不是。修剪只移动已有片段的入点/出点，不产生新片段；Blade 是把一个片段裁成两段。精剪优先用修剪。
为什么我往外拖，片段拉不长？
这端的余量用完了——原始素材只拍到这里。白色描边尽头就是素材尽头，拉不动是正常现象。
拖片段和拖片段边缘有什么区别？
拖整个片段是移动位置，会在原处留下空隙；拖边缘才是改时长。想让后面片段自动跟上，要用波纹修剪（见 波纹修剪）。
Learning Objectives学习目标
After this card you can explain what trimming is, where handles come from, and drag clip edges in Selection mode to adjust In and Out points precisely.
Concepts概念说明
Trimming means adjusting a clip's In and Out points after it is already on the timeline — the rough cut settles "is the order right"; trimming settles "where exactly does each cut land". It is called the editor's most important skill.
- Only the boundary moves: trimming never slices a clip or creates new ones — it just makes an existing clip longer or shorter.
- Handles set the limit: the unused footage at a clip's head and tail is its handles, shown as a white outline while you drag — once they run out, the clip can't stretch any further.
- Two modes, two jobs: Selection mode (
A) drags edges to change duration and is the intuitive start; Trim Edit mode (T) unlocks ripple, roll, slip, and slide (see Trim Edit Mode). - Trim several points at once:
Cmd/Ctrl-click to add more edit points and drag them together; keyboard nudges are more precise than the mouse.
Steps操作步骤
- Make sure the timeline is in Selection mode (press
A; the arrow button in the toolbar stays highlighted) - Hover over a clip's left or right edge until the pointer becomes a trim icon
- Hold and drag the edge: outward to lengthen the clip, inward to shorten it
- Watch the frame offset in the tooltip (e.g.
+00:20) and release on the mark - Move the playhead back before the edit and play through to check the join
Practice练习
- Drag any clip's Out point about a second shorter, then drag it back, watching the white handle outline.
- Nudge a clip to the right to open a gap, then drag the next clip's left edge outward to fill it.
FAQ常见问题
Is trimming the same as cutting with Blade?
No. Trimming only moves an existing clip's In or Out point and creates nothing new; Blade slices one clip into two. For finessing, trim first.
Why won't the clip stretch when I drag outward?
That side's handle is used up — the camera simply stopped recording there. The end of the white outline is the end of the footage, so it won't budge.
What's the difference between dragging a clip and dragging its edge?
Dragging the clip moves it and leaves a gap behind; dragging an edge changes its duration. To make later clips follow automatically, use a ripple trim (see Ripple Trim).
本卡术语Terms in this card
入点和出点In & Out Points 时间线Timeline 播放头Playhead 波纹Ripple 滑动Slide Edit 滑移Slip Edit 修剪Trim 偏移Offset