The project logo allows you to upload custom logos. They should have a transparent background. The size of the .jpeg/.bmp/.gif/.jpg/.png file should have at most 150 x 50 pixel.
In the following example, see how to replace the Matrix requirements logo with your own project logo:
Note: This will change the global project logo on the top left of the page and adapt the logo in html downloads. To change the logo present on your documents, you need to adapt the Word template (more info on Word Templates)