How to specify thickness of horizontal/vertical ruler

Horizontal lines in grid. Specify the thickness of the rule to be drawn horizontally above and beneath the headings of the columns in the question box.

Vertical lines in grid. Specify the thickness of the rule to be drawn vertically to the left and right of the headings (/elements) of the columns in the question box.

The combination of these two attributes will create a frame around the text in the elements.

Values are:

• heavy – A heavy rule.
• medium - A medium rule.
• light - A light rule.
• none – No rule.