You can customise your invoice per sales channel.
To do this please select Shipping->Invoice & Shipping Labels
From here you can customise your invoice per sales channel.
To add your company logo please select the invoice template you want to customise and then select the settings tab
From here you can upload your company Logo into Selro, Selro will generate an image URL which you can use to add your image to your invoice template
Please select 'Invoice Text' tab-> View-> Source Code
This box should appear
In here please enter the following <div><img src="image url here "/></div> above company name
(Please enter the image URL generated by Selro here)
Your Image will now appear in your Invoice template you can adjust the size and position of your logo here.