Logo placeholder
Create a _header.md page in content folder. Its content is what you get in the logo placeholder (top left of the screen).
Logo placeholder consideration
Do not set [menu.main] in the frontmatter of your _header.md file
Tip : you can add a image, a combobox with links to other documentation….
Tip 2 : look at
extra static menu if you want to add links to other website in this sidebar