46 of the inside sliding glass door 26 the screen panel 30 is preferably provided with means for locking the panel 30 in place against either the left vertical frame member 18 or the right vertical frame member 20 of the door frame 12 those of ordinary skill in the art will be aware of several mechanisms for accomplishing this objective in the preferred embodiment shown the rectangular frame 32 of the screen panel 30 is provided with spring loaded pins 88 the spring loaded pins 88 are generally biased so that they extend beyond the edge of the rectangular frame 32 when the screen panel 30 is locked in place in the door frame 12 the spring loaded pins 88 are received within screen locking holes 90 formed in the door frame 12 when it is desired to remove the screen panel 30 from the door frame 12 the spring loaded pins 88 are pulled such that they are retracted within the rectangular frame 32 of the screen panel 30 in the preferred embodiment a center frame member with a weather strip 94 is also provided to provide additional support for the screen panel 30 with the spring loaded pins 88 retracted into the rectangular frame 32 the screen panel 30 may be removed from the door frame 12 for cleaning or adjustment to the opposite end of the door frame 12 the retracted position is shown in fig9 b and the standard biased position is shown in fig9 a fig1 6 show a preferred embodiment of the present invention with the screen panel 30 in a left hand orientation and use of the door assembly 10.