SOP — Newsletter Banner
Image Generation

Nearly identical to the Blog Banner SOP — but with a critical difference: newsletters live in their own dedicated ChatGPT chat, separate from blog banners, to preserve independent style contexts.

OwnerPablo (Coordenadas)

StatusFully Manual

Ratio16:9

Prerequisiteblog-post-generator skill (newsletter subjects)

Overview

De un vistazo

This process is nearly identical to the Blog Banner SOP. The only structural difference is that newsletters live in their own dedicated chat inside the brand's ChatGPT Project — separate from the blog banner chat — even if the visual difference between the two is subtle.

Keeping them separate preserves independent style contexts and prevents cross-contamination between the two banner types over time.

Step 1

Open (or create) the brand's newsletter banner chat in ChatGPT

In the company ChatGPT account, go to the specific brand's Project. Look for a chat named something like "Newsletter banner image generator" (or similar).

Do not use the blog banner chat for this — even if the designs look nearly identical, they stay in separate chats.

Step 2

Initialize the chat with visual references

First time only — skip if the chat already exists and has been used before.

Attach the brand's visual references — past newsletter banners if available, or the design sheet if not — then send the initialization prompt. Mirror the blog banner initialization exactly, substituting "newsletter" for "blog":

Using past newsletter banners

"You will be a chat used solely for the purpose of generating images. Specifically banners that will be used for newsletters. I want you to replicate the same design styles and layouts of the images attached to follow the same branding.
Now generate a banner for a newsletter with the subject: [Newsletter_Subject]"

Using a design sheet (no past banners)

"I need you to create the images for the newsletter banners. Follow the design style of the image attached — same colours, same contrasts, same fonts, same design elements, same ratio, same layouts, similar photography style. You may generate new images, but keep them visually consistent.
The subject for the first newsletter banner is: [Newsletter_Subject]"

Always select "Create Image" as the action and 16:9 as the image ratio before generating.

Step 3

Generate one banner per newsletter

For each newsletter in the month's content plan, in order:

Send a short prompt — the title, subject line, or a close variation of it:

"Now I want you to create a banner for the newsletter: [Newsletter_Subject]"

Select "Create Image" and confirm the ratio is 16:9.
Review and approve before moving to the next one.

Step 4

Download and name files as you go

Download and name each banner immediately using this convention:

Naming Convention

newsletter.[number]

newsletter.1 newsletter.2 newsletter.3 newsletter.4

The number corresponds to the newsletter's order in the month's content plan. Name at download time, not at the end of the session.

Principles

Principles to preserve

Separate chat from blog banners, always. Even a small design difference justifies its own chat — style contexts should never mix between content types.
Same rules as blog banners otherwise. Visual references over written descriptions, 16:9 every time, name at download, regenerate instead of editing.
Use the newsletter subject, not the blog title. The prompt input here is the newsletter subject line (or a variation of it) — not a rephrased blog title, even when the topic overlaps.