Image quality/size

Hello and thanks for the great tool, it really is amazing. I do however experience a major glitch with the quality of the images:

• regardless of the image quality and size i select from my local drive, the presentation only uploads a rather small 332x188 thumbnail of the actual image. (I am using H5P in Moodle)

I am (almost) sure that I am missing something, can you point me in the right direction as to insert a large image in the presentation?

Thanks in advance,
--m