Configure the option "Beep on errors" during spell checking (File | Options)

Here you can configure if PlanMaker emits a sound when it detects a spelling error while you type.

Supported on: At least Windows Vista
Registry HiveHKEY_LOCAL_MACHINE or HKEY_CURRENT_USER
Registry PathSOFTWARE\Policies\SoftMaker\PlanMaker 2018
Value NameOnlineBeep
Value TypeREG_DWORD
Enabled Value1
Disabled Value0

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