Blank space in SU online



I am currently in school in SketchUp class. (Online in Chrome.)

I recently projected dining table, then toolbar and everything dissapeared and 1/3 of screen is covered blank space from left side.
I cannot find a solution elsewhere, so you guys are my only help.

I hope there would be somebody ASAP.



I am here again, i noticed the small left toolbar and i used ctrl + mouse wheel, its alright already.
Sorry for bothering you.