My PC can't keep up with Davinci...

I just have to accept the fact, that my PC is not doing well with Davinci (she's old, and doing her absolute best).

But it's really annoying and it disrupts my work flow, when I can't even cut my footage, without everything lagging like hell... Is it possible to somehow put down the "preview resolution", so I can edit my video without it putting a big strain on my poor computer? Without it actually changing the resolution of the final result ofc. - Kinda like setting all your setting to low in a pc game, so your old pc don't kill itself.

I use windows and davinci resolve 19.