If you're clicking on the Read&Write for Google Chrome icon on the Chrome toolbar (as shown below) it will close the Docs (and web) toolbar.
However the toolbar won't "remember" to stay closed in Google Docs unless the tab is clicked on the Read&Write for Google Chrome Docs toolbar. as shown below
To keep the Read&Write for Google Chrome Google Docs toolbar closed, click on the tab with the purple puzzle piece icon as shown above
That will keep the toolbar retracted when opening Docs
The toolbar does remember the position it was in when a Doc is closed:
- If a Doc was previously closed with the toolbar open, it will appear in the open position the next time that or any other Doc is reopened.
- The opposite will occur if the toolbar was retracted when a Doc was closed