In the first step it is necessary to fill in the name, keywords, and naspsat short and concise label. Use commas to separate keywords by pressing the ENTER button, not a comma, period, space, etc...
The picture that you insert here will be seen on the page with the models, you need to select the image důkladě to the model was the best seen. In the event that you have a video, not a problem to insert, for example, via a link from youtube.
In the last step, you upload a file with the appropriate model. Depending on what model will I use to select the appropriate category. Finally, consider what exactly you want to assign the licence model.
It is possible that over time, you will want to change the license, or alter the keywords etc. .. The problem is not these things change even after uploading the file.