ソーシャルポスター：一つの概念で全プラットフォーム
フィード・Storyのテンプレとセーフゾーン。
The pain point for ops teams is rarely “can’t draw”—it’s one campaign needing five sizes, three copy variants, and two languages. AI Image 2 shines with accurate text + switchable ratios + Thinking batches. This tutorial gives you a copyable social poster production line.
Platform size quick reference (2026 common)
| Platform | Use | Ratio | Notes |
|---|---|---|---|
| WeChat / blog header | Cover | 2.35:1 or 16:9 | Title in center safe zone |
| Weibo / X feed | Post | 16:9 / 3:2 | Keep corner badges off edges |
| Xiaohongshu / Pinterest | Cover | 3:4 | Title in upper half |
| Instagram post | Feed | 1:1 | No critical info in corners |
| Story / vertical video | Full screen | 9:16 | Avoid top/bottom 12% UI overlap |
| LinkedIn post | Feed | 1.91:1 | Slightly corporate realistic |
Pick a master KV at 16:9 or 3:4 first, then derive other sizes.
Workflow overview (90 minutes per campaign)
Brief sheet → Thinking master KV → curate pick 1 → ratio switch derivatives → local copy edits → export naming → schedule uploadStep 1: Campaign brief sheet (copy template)
| Field | Example |
|---|---|
| Campaign | Mid-year sale 618 |
| Main slogan | ”More Than Half Off” |
| Sub slogan | ”Jun 1–18 storewide” |
| Primary colors | #E63946 + #1D3557 |
| Must-show | Specified product shot style |
| Forbidden | Competitor names, unverified superlatives |
Step 2: Master KV prompt (3:4 cover example)
Thinking mode, social cover 3:4 portrait.
[Copy] Main headline "More Than Half Off" (large bold), subhead "Jun 1–18 storewide" smaller.
[Scene] Center product group: sunscreen + sunglasses, summer beach bokeh background,
brand accent #E63946, bright commercial photography, headline in upper third.
[Forbidden] Garbled text, watermarks, malformed fingers.Generate 4 candidates → pick 1 for Step 3.
Step 3: Ratio derivatives (no creative rewrite)
Based on the previous image:
1) Change to 16:9 landscape, headline left, product right, for feed posts.
2) Change to 1:1 square, headline centered top, product centered, for Instagram.
3) Change to 9:16 vertical Story, headline shifted up 15% safe zone, product lower center.
Keep colors and product consistent each time.Request three ratios in one message or split into three for stability.
Step 4: Multilingual variants
Layout identical to the previous image, only replace copy:
Title "SUMMER SALE", subhead "Up to 50% Off · Jun 1–18"Japanese and Korean work the same way; for RTL (Arabic) prefer text-free image + localized overlay.
Step 5: Text-free version + post overlay (insurance)
Thinking mode, 3:4 summer beach product scene,
reserve upper 30% solid gradient whitespace for later typography,
no text at all.Designers overlay brand fonts in Figma / Canva—change pricing on launch day without re-running AI.
Step 6: File naming and archive
2026-618-social-cover-v2-approved.png
2026-618-feed-16x9-v2-approved.png
2026-618-story-9x16-v2-approved.pngAttach prompt-master.txt for reuse next year.
Scheduling and A/B
| Version | Variable | Metric |
|---|---|---|
| A | Slogan emphasizes discount | CTR |
| B | Slogan emphasizes new arrivals | CTR |
| C | Model vs product only | Save rate |
Compliance reminders
- Avoid unverified superlatives like “best” or “#1”
- Promo dates and prices must match backend config
- Portrait rights: label AI faces or use faceless compositions
| You already learned | This tutorial adds | | Getting Started | Multi-platform size system | | Prompt Engineering | Social-specific BRICK | | Batch Generation | Weekly schedule batches |
Links to other tutorials
Today’s challenge
Pick a real campaign (even internal test) and deliver in 90 minutes:
- 1× 3:4 master KV
- 2× derived ratios
- 1× text-free backup
After that, your social poster output upgrades from “single-card luck” to a schedulable production line.