Editor's page

This is a page that is used for training purpose.  It was created using Create Page (top right, between Edit Page and More actions) 

1.    This is a link to a document in Google Drive that can be edited safely without affecting anything else.
2.    An example table with inserted images.

 Image inserted and centred
Adjust size by dragging sides of cells
I don't know how to centre this table
Text left adjusted External border now 5 pixels wide, adjusted in html