Since editing a lot of items is so time consuming I've searched for a method to do that as quick as possible.
I'm using firefox and I've activated the plugin Customize your web.
Thus I get:
- forward/back button nearby SAVE
- automatic scroll down to the bottom after loading the page
- thus having: default material, shop sections, markup in my view
- eliminating some unneeded stuff so that rendering is quicker
- copy the main image in this view area to see the item