Add Custom Links into Header-Menu
If you want to add Custom Links to your Bookstack Navigationbar / Header-Menu you need to use the Settings-Page from your Bookstack.
As Default it would look like this:
Lets Say you want to add a "Buy me a Coffee" Link for People to Support your work or whatever else you need to open the Bookstack "Settings-Page" from your Wiki and then open the "Customization" Tab, scroll to the Bottom of the Page and insert the following Code into the "Custom Code Section":
Please change the Icon and the Link to your Website ;)
The Result would look like this: