[sneakysunny]

Thanks for your feedback, very helpful. We're fixing the first two points as soon as possible.

Regarding additional data: yes, you can add a header or a subheader.

We don't have a function yet to send a permalink, but this is something that we're thinking about. How would you use this? Share the link with a friend so he/she can view the image? Or would you use the permalink to continue editing?

[gus_massa]

I can add a global header and a global subheader, but I want to add asubheader to each city. For example the date of arrival/departure to each city, like the t-shirts of a tour of a rock band.

The permalink is a tricky feature. I guess it's easier to implement a static version, that the other person can continue editing and then share another permalink. (Like the long links in Google maps.) I don't know if users will understand this model.

It would be more useful to be able to have a shared address, where everybody can edit and the changes are propagated to all the editors. But for this you probably will have more problems: Who can delete the link? who can make it read-only? How to allow only some people to edit? …

EDIT: The button "create poster" is just next to "login". I first thought I must register before traying. Perhaps you should separate them. Try searching for patio11 and big, orange, pancake buttons. https://www.kalzumeus.com/2011/12/01/inaugural-kalzumeus-pod... https://www.kalzumeus.com/2014/05/12/conversion-optimization...