| usage | description |
|---|---|
| sel display box [on|off|tog] | shows a bounding-box around current selection |
| sel display color [on|off|tog] | draws current selection in a selection color |
| sel display flash [on|off|tog] | enables momentary flashing of current selection in a selection color |
| sel display flashTime [N] | sets flash time to [N] seconds. |