How do I upscale?

[DodgyDave]

I've installed Recalbox on my Raspberry Pi 5 and i've seen videos on the Recalbox World YouTube channel which shows upscaling for the Saturn and Dreamcast. How is that achieved?
Sega Saturn upscaling video: https://www.youtube.com/watch?v=r7OCG_J9ndA
Dreamcast upscaling video: https://www.youtube.com/watch?v=r7OCG_J9ndA

Ideally i'd like to do it for the PS1, Saturn, N64 and Dreamcast.

If someone could give me some simple instructions (as I am new to this) i'd be forever grateful.

Thanks.

[Magaki]

Hello,

The most simple instruction : Active "HD Mode" on Game options into Recalbox menu.
The less simple instruction(s) : Dig into the settings of each emulator and set your options, and it will depends of each one, options are not uniform between them.