I am really sorry for the confusion. I meant when I have edited a clip for example and I go to sequence and then press render in to out, it renders the selection and then when I play the video in my timeline it looks a lot blurrier than before I rendered (so this is all pre export). And although it looks fine post-export, it would be nice to be able to see the full product in the timeline in full quality before exporting it. So, I was wondering it that problem can be resolved.
No worries, different people use "render" differently so just making sure we're on the same page.
So your Render In - Out settings are determined in Sequence Settings - Video Previews. Your options are fairly limited so I recommend experimenting and finding a good setting/format that works for your specific footage. Your footage is 4k, and your current settings are rendering out in 1080. So you are lowering the quality significantly for preview purposes, but you gain performance that way. You could up that to 4k and you'll likely have better looking previews, but those renders will likely take longer to process/create. It's up to you which method you prefer. Obviously there's pros and cons to both.
AdChoices