[TYPO3-english] Bootstrap options

[Gunnar Jonsson]

I have installed TYPO3 8.7.10 with the introduction distribution. There I see a lot of options for bootstrap in the template. Are there any website with description of the different options and how they look like in the frontend? I need some help for options like:
[page.theme.navigationstyle]
[page.theme.navigationtype]
[plugin.bootstrap_package.settings.cssSourceMapping]
@navbar-border-radius
@navbar-default-toggle-icon-bar-bg
Regards, 
Gunnar Jonsson