Sliding glass window panels are made to be removed without much difficulty. To remove the stationary panel you will need to remove the sliding panel first. There is a rail in between the stationary and sliding panels that will require removal as well. Stationary panels secure to the window frame using either screws or brackets, depending upon the manufacturer and how old your window is. You may need a friend to assist you due to the weight of the window panel. Depending upon the size of your windows, the individual panels can be heavier than they appear to be.
Use a Phillips-head screwdriver to remove the screws that secure the upper rail between the stationary glass panel and the sliding glass panel. The upper rail is in two pieces along the inside top of the window frame, and separates the stationary panel from the sliding panel. With the sliding window shut, remove the upper rail in front of the stationary panel.
Slide the window open and remove the screws on the other half of the upper rail. Slide the operating sash to the half open position. Grab the sides firmly with your hands and lift the panel into the upper track. Swing the lower part of the panel toward you and remove the panel from the window frame.
Remove the screws securing the stationary panel bracket to the window frame with a Phillips-head screwdriver. The stationary bracket is on the upper corner of the stationary panel. Remove the bottom retainer that secures the stationary panel to the bottom of the window frame from the window sill.
Grab the stationary panel with both hands and pull it away from the side of the window frame. You may have to use a little force in order to break the silicon seal. Push the panel into the upper track and swing the bottom of the panel toward you. Pull the panel out of the window frame.