LinkedIn's carousel format — uploaded as a PDF document that viewers swipe through — has become the platform's most effective organic content format, regularly generating 3–5× the engagement of single-image posts. The format rewards structured, information-dense visual communication — exactly what image grids excel at. Each carousel slide is a ~1080×1080px square image, and a grid layout within those slides multiplies information density. Proven LinkedIn carousel grid strategies: (1) the data storytelling carousel — slide 1: 2×2 grid of four key metrics (thumbnail), slides 2–5: each metric expanded with annotations; (2) the process documentation carousel — slide 1: 2×3 grid of six process steps (thumbnail), slides 2–7: each step detailed with screenshots; (3) the portfolio showcase carousel — slide 1: 3×3 grid of nine project thumbnails, slides 2–10: full-bleed images of each project; (4) the case study carousel — slide 1: 1×3 grid showing problem → solution → results, slides 2–4: deep dives into each phase. The grid-as-thumbnail pattern is particularly effective on LinkedIn because the PDF thumbnail in the feed shows only the first page — a multi-cell grid thumbnail promises value across multiple topics, while a single-image first page limits perceived value to one topic. Build each carousel slide grid in MergeFrame, export at 1080×1080px (LinkedIn's recommended square dimensions), and assemble into a PDF. For text-heavy LinkedIn content (charts with labels, annotated screenshots, process diagrams), use MergeFrame's higher resolution export (2000×2000px) to ensure text remains crisp after LinkedIn's compression. The local processing architecture is important for business users: confidential company data, internal dashboards, and unreleased product screenshots should not be uploaded to a cloud-based design tool before they appear on LinkedIn.