1. Once I edited dosbox-0.74-3.conf, fullscreen=true worked. fullscreen=true is not what is desired.
Motherboard HP 550-036, 2b2c
Processor type and speed i3-4170, 3692 MHz
Amount and type of RAM 4GB DDR3 SDRAM PC3-12800
Video board w/ RAM amount and type Intel HD graphics 4400
Sound board "Intel 8 Series HD Audio" rev 0x05: msi
Operating system OpenBSD 7.0-current (GENERIC.MP) #54: Tue Oct 26 10:38:00 MDT 2021
Game name (and version, if applicable) RapidFile 1.2
Description of problem On 4KUHD monitor, DosBox window is small to the point of being illegible unless fullscreen=true is used
Reproducibility of problem always
Sound mode used N/A
Video mode (Software, OpenGL, Direct3D, or Glide, and resolution)
Version of emulator 0.58+
Steps already attempted to solve the problem: edited scaler, fullscreen, fullresolution, output in dosbox-0.74-3.conf.