Currently Zoomed Selection tool's zoom level is defined by the size of the selection rectangle you draw.
Problem:
need to zoom house on this image 200%

I draw a Zoomed Selection frame around the house

it zooms to 482% where all is pixelated and useless zoom level.

In reality needed to zoom 200% .

In order to get zoom level 200% with Zoomed Selection tool would have to precisely guess the right size of selection box before drawing it, which is unrealistic.
Feature request: provide ability to specify max zoom limit for Zoomed Selection tool (say no more than 200%) so it will never zoom more than that, simply use center of selection as center of zoom area.
P.S. Of course can zoom out with minus (-) key on keyboard, but its extra work, imagine need to look trough 100+ images and check if subject is in focus, this additional work makes XnView MP less efficient for that task.