How to change Email Logo in Magento 2

Email Logo is insert into the header and footer of the transactional email message. Similarly to the Store Logo, the Email Logo is also one of the best ways for the audience to identify your brand easily and at same time, your store becomes more reliable to the visitor. Therefore, right after installing Magento 2 successfully, the first of all is replacing the Magento 2 Defaul Logo by your own logo.

The logo accepts many types of the image field including JPG/JPEG, GIF, PNG, or SVG, and it is flexible to customize the size of the logo from Magento 2 Admin. However, I have a tip for you. To ensure that your logo is displayed clearly on high-resolution devices, should upload that image whose dimension is three times as large as the required size in the header. If you don’t know the size of the logo, or any image that is used in your theme, just right-click on the image on your site, and inspect the element to get its size.

Two following steps will help you know what you can do to change Email Logo in Magento 2

To Change Email Logo

• Step 1: Upload your logo
• Step 2: Select the Header and Footer Templates
• Step 3: Save Config and design

Step 1: Upload your logo

• On the Admin Panel, Content > Design > Configuration.
• You can see the existing design configuration on the management table, then click on Edit under Action.
• On the workplace, please scroll down to Other Settings, open Transactional Email setion,
  • To change your Logo Email, click on Upload to choose one of the image file you want to aplly for your logo.
  • Enter the alternate text identify the Logo Image Alt.
  • Require Logo Width and Logo Height in pixels. Just enter the number that don’t include “px” symbol. The appearance of the email logo in the header depends on the offered value size instead of the real size of the logo.

Step 2: Select the Header and Footer Templates

If you want to modify Header and Footer templates or have multiple stores, you can assign a specific template to each, that will appear on the transactional email message.

• Select the Header Template and Footer Template from the available list as needed.
• Save Config to finish and the design of the email is active.

Ref: Magento 2 User Guide