Version

PrusaSlicer-2.1.0+win64-201909160915

Operating system type + version

Operating System: Windows
System Architecture: 64 bit
Windows Version: Windows 10 (build 18362), 64-bit edition
Total RAM size [MB]: 34,312MB
OpenGL installation
GL version: 4.5.13447 Compatibility Profile Context 20.19.0.32837
Vendor: ATI Technologies Inc.
Renderer: AMD Radeon R7 200 Series
GLSL version: 4.50
(I didn't copy/pasted the extensions)

Main monitor 2560x1440
Second monitor 1680x1050

Behavior

The "Show" dropdown list with the checkboxes (Plater view after slicing) goes outside the screen while in full screen on my second monitor. Moreover, the focus of the main window is lost, that means that the list is a window itself (thus the Alt+Print Screen will make a screenshot of this small part only). I have no problem with the first monitor.

Is this a new feature request?
No.

I feel that the different vertical resolution between the two monitor is the root cause.