HPS wrote

LibreCAD:
Version: 2.2.2_alpha1-2-g59562643
Compiler: GNU GCC 14.1.1
Compiled on: May 21 2024
Qt Version: 6.7.0
Boost Version: 1.83.0
System: Fedora Linux 40 (Server Edition)

Fedora:
Operating System: Fedora Linux 40
KDE Plasma Version: 6.0.4
KDE Frameworks Version: 6.2.0
Kernel Version: 6.8.10-300.fc40.x86_64 (64-bit)
Graphics Platform: Wayland
Memory: 62.5 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics

Hi,
I set Current Drawing Preferrences to A4 landscape.
In print preview I get a scale of 1:8.65796 preset in the toolbar.

I set Current Drawing Preferrences to A4 portrait
In print preview I get a scale of 1:12.2448 preset in the toolbar.

Both previews fit the drawing to page.

I can enter a differen scale but
in neither case modified entry does change the drawing-scale to, say 1:5.  

zooming in / out changes the 1:5 to the preset values
and the print-preview tool bar icons get replicated to the right (a 'second' print-preview tool bar) for a brief moment.

The command line prints:
qt.core.qobject.connect: QObject::connect: No such signal QComboBox::currentIndexChanged(QString)
qt.core.qobject.connect: QObject::connect:  (sender name:   'cbScale')
qt.core.qobject.connect: QObject::connect:  (receiver name: 'Ui_PrintPreviewOptions')

Thank you for consideration
Hans-Peter