What Is Screen Annotation?

Screen annotation covers every type of mark or overlay added to a screen recording to supplement the raw screen content with explanatory information. At the lightest end, this means a freehand arrow drawn to point out a specific button. At the more structured end, it includes typed text labels explaining a field's purpose, numbered callouts identifying steps in a workflow, rectangular boxes drawn around the relevant UI element, or spotlight effects that dim irrelevant screen area. The common goal across all annotation types is to close the gap between what the screen shows and what the viewer needs to understand.

Annotations can be added during recording (live annotations) or after recording in a video timeline editor (post-production annotations). Live annotations have the advantage of natural timing — they appear exactly when the presenter decides to draw attention to something, synchronized with narration. Post-production annotations offer more visual precision and the ability to use rich graphic elements (custom arrows, branded colors, styled text boxes) that are impractical to create live. Professional tutorials often use a combination: live annotations for spontaneous callouts and post-production annotations for structured callout frames that require pixel-perfect placement.

Limelight provides a live annotation toolkit accessible during recording: freehand drawing (⌃⌥3) for pen strokes, region spotlight (⌃⌥4) for area dimming, and on-screen text (⌃⌥5) for typed labels. These three tools cover the most common annotation needs — point it out, focus on it, name it — without requiring the presenter to leave the recording session or open a separate app. All annotations are baked into the exported video at render time, making them part of the permanent video frame rather than a separate metadata layer that could be lost during file conversion or platform upload.