Hi,
The value in the VisualGDB Project Properties is set for all configurations and is stored in stm32.props:
<ItemDefinitionGroup>
<ToolchainSettingsContainer>
<ARMCPU>cortex-m4</ARMCPU>
<InstructionSet>THUMB</InstructionSet>
<FloatABI>soft</FloatABI>
</ToolchainSettingsContainer>
</ItemDefinitionGroup>
The corresponding VS property could override it for each configuration, but we do not recommend changing it manually to avoid confusion.