Horizontal Ruler

Menu Edit — Add Tag — Graphics — <hr> (horizontal ruler)

To modify the horizontal ruler, put the cursor inside the tag: <hr |/>

Flat Line

context menu noshade — noshade

Size

context menu size — 3

The size is preselected: size="3". You can overwrite it.

Width

context menu width — 33%

The width is preselected: width="33%". You can overwrite it.

Horizontal Alignment