How do I create a table with border and grid lines in Moodle?

This refers to Moodle 3.4 from July 2018 onwards

Creating a table in the Atto text editor

Inserting a table in a Label or Page is simple and includes options to add a border and grid lines. 

To create a table click the Table icon

Give the table a caption or title, say whether you want to put headers on columns, rows or both, and choose number of rows and columns.

You can choose how you wish to format the table borders and background colour.

It is not possible to format the table with merged cells or in any other way in the ATTO editor.