Do we have any more guidelines about using the tagline? Should it only be used with the logo and name as in the inkscape-text.svg? Can we use tagline separately on merchandise? 

For example can I have a pillow case printed with a repeating pattern of only "Design freely."?

https://inkscape.org/en/about/branding/
https://inkscape.org/en/about/trademark-policy/

Mihaela