XnView Software

XnViewMP 1.7.1 64bit
Windows11 (23H2), display resolution 3840x2160, win scaling 150%

Viewer - selection

To reproduce:
1. open any image in Viewer

issue A
2. hold LMB, move cursor to make selection (do not release LMB)
3. press SHIFT, move cursor a little bit
4. release LMB
OR
3. hold RMB, move cursor a little bit
4. release RMB

new selection alike rectangle appears at the place of size tooltip
selection becomes unusable and disappears if switch focus to another app

expected behavior
- SHIFT should work as expected
- RMB not to interfere with the selection process


issue B1
same issue with Crop panel
2. hold LMB, move cursor to make selection
3. press SHIFT, drag corner point to change selection to square
sometimes it's not possible to change selection size


issue B2
2. hold LMB, move cursor to make selection
3. start dragging corner point, press SHIFT to change selection to square
4. release SHIFT and LMB
5. start moving selection OR switch focus from application
selection will return to previous size

Thanks to your detailed description I can reproduce the problem.

This problem is supposed to be fixed in XnView MP 1.7.2. Please check and confirm the bug fix here.

172
A - fixed partially
1. hold LMB, move cursor to make selection (do not release LMB)
2. press SHIFT, move cursor a little bit
3. click and release RMB
new selection alike rectangle appears at the place of size tooltip
selection becomes unusable and disappears if switch focus to another app

B1 - fixed partially
not sure if its a big deal, but
1. make selection, release LMB
2. press SHIFT and try to resize selection
selection cannot be resized

B2 - fixed