So sorry, can't catch your thought. Your case is not good. Thanks.

No problem, I’ll try again (both, Safari and FF): There are three blue handles to pop up next to the schematic. At the left hand side, between the file listing and the schematic, when hovering above that space you can see a tiny white triangle (it’s even there without hovering, nearly invisible) where the blue handle will come up. In the middle of that handle, close to the triangle, the cursor is a “pointing fist”, a tool tip text lights up “Toggle left bar”. Clicking that area the left listing will disappear and come back - OK so far (wait how many will cry “I’ve lost my file listing?”). Above and below that area the cursor is a line with double arrow - OK. Dragging the blue handle you can change the size of the listing field - OK. a) Similar at right hand side, but nothing to drag - might be OK (why not drag?) b) On top, below the icons, you can’t drag - OK, - but there the __white triangle__ is missing. __The point is:__ Either the triangle is wrong at right hand side OR it is missing at the top.