be for show

be for show

To be done merely for the sake of appearance, rather than being genuine or sincere. Edward always carries a book around with him, but it's all for show so he can appear smarter to other people. The items in the window are just for show, so I'm afraid I can't sell them to you.
See also: show
Farlex Dictionary of Idioms.

do something/be for ˈshow

do something/be done to attract attention or admiration, and for no other purpose: That expensive computer is just for show; he doesn’t really know how to use it.
See also: show, something
Farlex Partner Idioms Dictionary
See also:
  • do something/be for show
  • for show
  • with (one's) hand on (one's) heart
  • with your hand on your heart
  • put (one's) hand on (one's) heart
  • argue the point
  • for its own sake
  • for God's sake
  • for God's, heaven's, pity's, etc. sake
  • for Pete's sake