As the Company Administrator you can upload the logo for your team by going to Settings --> Teams --> Click on the name of the Team to open the team details. Here you will be able to upload the logo for your company/team.
Note: We suggest an aspect ration of 1:1 for the profile photo and the company logo. In terms of dimensions, we suggest around 400x400 pixel.
The logo is used in small sections across the template (authentication form, navigation menu, etc) and always in small size. If you do want a larger version of the logo in the welcome page, the best way is to use an image upload.
The logo added here will then be able to be added to templates that you customize by adding a new element.