After getting my 21' trinitron back to life, I realized the image is blurry, specially with white text on screen
and I would like to calibrate the image with some paused screen when some text is appearing, fortunately I can find some game that shows text all over screen for that test.
Is there a button (I use 8bitdo snes 30 pro) to pause it like this?
Megadrive has "pause when OSD is open", SNES doesn't. Any RPG or strategy game would do, but better use this "industry standard" tool for calibration: https://artemiourbina.itch.io/240p-test-suite
CRT SCR$ Project - building a collection of high-quality photos of CRT displays
CRT ART Books - retro-gaming books with authentic CRT photos
https://junkerhq.net/xrgb/index.php?tit ... test_suite
Use this ROM to calibrate your CRT. They have ROMS for all systems.