Is there a way to disable blur?

[L1Q]

I'd like to have my zoom-in replicas nice and crisp with those pixels clearly visible. Would appreciate if it could also automatically set window width/height to x^2.

[LorenzCK]

Thumbnails are managed by Windows and there is no way disable/change the scaling algorithm: the best way to avoid any blurring and keep the replica crisp is to set it to a 1:1 scale. You can do that automatically by right-clicking, resize → fit to window.

This is also where you can automatically set the replica's size to double the original, i.e. resize → double.

[L1Q]

My use case is viewing small part of the window blown up x8 or even x16. I guess my question converts to a feature request: I want to have resize options up to 16:1. The image will still look blurry, but hopefully the least blurry possible.

[LorenzCK]

Ok, adding more resizing options will not be a problem. ☺️ Since the scaling method cannot be customized by OnTopReplica unfortunately, your best option will indeed be to set the window size to integer multiples of the original window.