Type "Course Presentation" background image

I have difficulties to fill in Copyright information in the field of Background image. Because the field which opens for this to do is very little and one can use the scroll only "up-down" and not "left-right". Furthermore, the copyright-Information for the backgroundimage filled in there does not appear in the "rights of use"-menuebutton below the published h5p-Element. As a recommended "workaround" (thanks to Matthias Andrasch) I just uploaded the Background image twice as a normal image and made it very little on the first page of my course presentation. For this normal image I could naturally insert the Copyright information as I´m used to. And now this information appears in the published h5p-Element. But its not very nice to have that "mini-image" on the first page only due to grant the copyright information.

I attached the whole element adopted/filled in by me and two screenshots showing the problem with my filling in highlighted.

I´m using Chrome and Course Presentation Editor 1.17.2 and Course Presentation 1.17.4

This is the WordPress Surrounding I´m publishing in.

I´m not a developer but only user /content adopter of this h5p-elements

Could anybody help me?