Yeah, RPG Maker VX Ace and XP have smaller resolutions by default. Not too bad on a 1080p or lower resolution monitor but on a laptop especially on a 2560x1600 18" screen, it can be very small as seen on this image.
It's the same issue with RPG Maker MV which by default runs at 816x624 although it can be changed to a higher resolution such as 1280x720 while Didnapper 2 runs at 1080x720. On a 1080p, it's not too bad. MV and MZ games can be run in fullscreen by using F4 (or FN+F4 on some computers).