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Learning guide
Nano Banana Image Editing Guide

Learn image generation and editing workflows with Nano Banana for consistent visual output.

4 chapters·7 guides·Access varies by chapter
Output Specs and Ratios
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Output Specifications and Ratios

Choose the destination ratio and actual available export size before generation. Prompt text alone does not guarantee a resolution tier.

#Source-guide canvas examples

The following are planning examples from the original guide, not universal current platform requirements. Confirm the destination's accepted sizes and crop behavior before publishing.

UseExample ratio/canvas
WeChat article coverAbout 2.35:1, such as 900 × 383
Article illustration16:9 or 4:3, such as 1080 × 608/810
Xiaohongshu portrait3:4, such as 1080 × 1440
Vertical video/story9:16, such as 1080 × 1920
Square social/product1:1
Portrait feed4:5, such as 1080 × 1350
Landscape coverAround 1.91:1 or the destination's required ratio
Presentation image16:9, such as 1920 × 1080
Print posterFinal physical size, such as A4 or 2:3

For ecommerce, the source lists several 750–1000-pixel square examples. Actual marketplace requirements vary; check the listing channel rather than applying one minimum everywhere.

#Use real export controls

Do not assume the terms Fast/Pro/Ultra or a generic “4K” prompt establish official output options. Select the size the actual interface supports, then evaluate whether enlargement or other finishing is needed.

#Layout by purpose

For a product image, use an accurate subject, suitable clean background and balanced margins. For a social cover, reserve title space. For an article, keep the focal point clear. For presentation imagery, allow readable overlays. For print, check physical dimensions, pixel density, color workflow and bleed with the printer.

text
Create a portrait cover for [topic]. Place [subject] on the right. Reserve the left third for the title. Use [style/palette] and compose for 3:4.

#Whitespace

Reserve the side used by the headline, the top for a poster title, the bottom for details, the center for centered text or balanced margins for products.

text
Keep the bottom 20% clear. Place the subject right and preserve left title space. Use a simple background suitable for text overlays.

#Multiple sizes

Optimize the main destination, then crop or extend through supported editing for derivatives. Review each result. A series specification can record subject position, text zone, margins and a central safe region.

#Finishing

Use appropriate design tools for exact text/logos, color corrections and layout. Choose PNG for lossless/alpha needs, JPG for suitable lighter opaque images and WebP where the destination supports it. Keep a high-quality source and review compression.

Preserve required provenance/watermark information; an invisible provenance mark is not a visible layout element to erase.

#Next steps

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FAQ

Nano Banana 是什么?
Nano Banana 是 Google 基于 Gemini 模型推出的 AI 图像编辑工具,支持对话式编辑,用自然语言描述即可完成复杂的图像操作。
Nano Banana 和 Midjourney 有什么区别?
Nano Banana 更擅长对话式编辑和改图,Midjourney 更擅长从零生成。Nano Banana 对中文支持更好,且可在 Gemini App 中免费使用基础功能。
Nano Banana 有哪些模型可选?
三个层级:Nano Banana Fast(快速预览)、Nano Banana Pro(高质量输出)、Nano Banana Ultra(专业级 4K)。
如何提高风格一致性?
使用多图参考、建立风格关键词清单、每次都引用第一张图作为风格锚点,并减少单次描述的变化量。

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