TL;DR
Step 1: Access Print Labels
Go to the EasyScan dashboard.
Click on Print Labels.

Step 2: Select Custom Logo
Scroll down to Label Layout.
Select Custom logo from the dropdown menu.

Step 3: Upload Your Logo
Go to Shopify's Content settings in a new tab.
Click on Files and then Upload Files to upload your logo.
Copy the link of the uploaded logo.

Step 4: Insert Logo URL
Back in EasyScan, paste the logo link in the Logo Image URL field.
Check the Label Layout Preview for the logo appearance.

Step 5: Adjust Logo Size
Use the Custom logo size slider to adjust the logo size.

Step 6: Save the Label Template (Optional)
Scroll down and complete any other settings.
Enter a name for your template in the Template Name field.
Click Save Template.

Step 7: Print Your Labels
Select your products and choose the quantity to print.
Press Print All Labels to print the labels with your logo.

