Improve look & feel of the Front Knowledge Base

When you vote, please specify which one(s) of the below you are interested in. Please also feel free to add new ones via comments.

1. customize color of site header beyond just light and dark

2. adjust grid layout / density of categories

3. custom icons in the category card would be nice

4. wider layout of the content area

5. option to show/hide footer

6. More styling possibilities for articles

7. Improved header layout