Adding image if layouter is widen and set as slider

This is not a solution. you assume all users have touch pads because you all work with macs? what about people who use PC desktops? al lot of us out there.

Even if I go to preview, scroll and than go back to edit, the slider scrolls back automatically to the previous items, so I have no way of editing new added items in the slider.

Relying on the touchpad is not a solution and this should be fixed.
no workarounds, no magic, just fix it please