xwininfo -name knotify

xwininfo: Window id: 0x6600001 "knotify"

  Absolute upper-left X:  750
  Absolute upper-left Y:  576
  Relative upper-left X:  750
  Relative upper-left Y:  576
  Width: 1500
  Height: 768
  Depth: 24
  Visual: 0x21
  Visual Class: TrueColor
  Border width: 0
  Class: InputOutput
  Colormap: 0x20 (installed)
  Bit Gravity State: NorthWestGravity
  Window Gravity State: NorthWestGravity
  Backing Store State: NotUseful
  Save Under State: no
  Map State: IsUnMapped
  Override Redirect State: no
  Corners:  +750+576  -750+576  -750-576  +750-576
  -geometry 1500x768+750+576