Most usually just push up against 2 springs until it is high enough to remove from the bottom. Just a hint, open the sliding window first then slide the screen open about 4 or 5 inches, then put upward pressure on the screen frame, either on the top of the frame or wherever, keeping in mind you have to compress 2 springs in order to get the screen high enough to remove the bottom.
Othertonka
2004 Southwind 32VS 8.1 Workhorse chassis
2002 CRV Toad
U. S. Gear Unified brake system
Retired Fire Captain, SFD