1.) Enable theme
drush pm-enable themename
2.) Disable theme
drush pm-disable themename
3.) Show information about the theme
drush pm-info themename
4.) List all theme
drush pm-list --type=theme
5.) List enabled theme
drush pm-list --type=theme --status=enabled
6.) Set default theme
drush vset theme_default themename
7.) Set admin theme
drush vset admin_theme themename
8.) show theme status
drush status theme
9.) drush en -y views
10.) drush dis views