When you open your file, change CodePage to correct on in the CodePage menu (or clicking on code page name in statusbar) and reload your file (Ctrl+R)
You can native work in your code page. Menu View / OEM charset was made for another purpose - display special files with pictures made from chars -- <https://forum.pspad.com/read.php?2,71145,71147> PSPad freeware editor https://www.pspad.com
