Head to your "Company Settings".
Click on "Upload your logo" button and choose the image that you wish to use.
If you're happy with the result, select "save" in the bottom right of the screen.
Your logo needs to either be a .jpg or a .png file.
The maximum image size is 600px wide by 150px high.
If you wish to have multiple images as your logo, you will need to combine them and upload them as a single image.
The image will be centrally aligned (square images will appear in the middle, as per the image below).
Send us your logo, we're happy to resize or reformat it for you, and then send it back for you to upload.