Print differs fundamentally from screen display. Pixels that look sharp on a phone become visibly soft when enlarged to poster size. Colors that appear vibrant on a backlit display shift when rendered in ink on paper. And aspect ratios designed for Instagram (1:1 square) don't fit standard print sizes like 8×10, 11×14, or A3 without cropping. MergeFrame's print-oriented workflow addresses every dimension of the screen-to-print pipeline. Resolution is the cornerstone: for photo books and small prints (5×7, 8×10), export at 2400–3000px on the longest side — this provides 300 DPI at those dimensions, the standard for photo labs and print services. For posters and large-format prints (16×20, 24×36), export at 3600–4000px — at 200 DPI (acceptable for large prints viewed from distance), a 4000px grid produces a 20-inch print. For canvas wraps and gallery prints, match your export resolution to your printer's native DPI — most canvas services print at 150–200 DPI, so a 3000px grid yields a 15–20 inch canvas. Aspect ratio planning is equally critical. Standard print sizes and their ratios: 4×6 (2:3), 5×7 (5:7), 8×10 (4:5), 11×14 (11:14), 16×20 (4:5), A4 (1:1.414), A3 (1:1.414). Before building your grid in MergeFrame, decide on your target print size, calculate the corresponding aspect ratio, and set your export dimensions accordingly. For a 16×20 print at 300 DPI: export at 4800×6000px (but MergeFrame's max is 4000px — so export at 3200×4000px, which at 200 DPI yields 16×20). For a gallery wall layout with multiple grids, create each grid individually at matching dimensions, then arrange them physically on the wall. Consistency in cell spacing and border treatment across all grids in a gallery wall creates visual coherence. Color considerations: MergeFrame exports sRGB PNG files — the standard color space for photo printing. For professional print services that request Adobe RGB or CMYK, convert after export using a color-managed image editor. For photo books (Mixbook, Shutterfly, Blurb), a 3×3 grid at 3600×3600px creates a stunning full-bleed cover image. For annual family photo calendars, a 2×3 grid with one cell per month creates a year-in-review page. All processing is local — your high-resolution source photos never upload to a server, which is critical when working with 50MB+ RAW-derived images. Free tier: full 4000px resolution, all layouts, unlimited exports.