To whoever can help,
I installed XnviewMP. On my desktop computer I have a dual screen set-up. When I click the edit IPTC data in XnviewMP the dialog box opens into a rectangular shape too wide and it extends across both screens. I've tried shrinking the dialog box but it won't get smaller. The dialog box opens too wide even when I just have one monitor activated.
This happens on my laptop as well. I use Windows 10 on both machines. The regular version Xnview IPTC dialog box opens in a normal size box.
IPTC dialog box opens into a rectangular shape too wide
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