This is a feature request. In at least a few other staking wallets (Qtum for example), when you click on Settings->Unlock Wallet... the checkbox to unlock the wallet only for staking is already pre-checked.

I think this should be pre-checked in PIVX too as it may be the most common behavioral path (it is for me at least). Also this would make the default more secure than the current default.

What version of PIVX Core are you using?

PIVX Core version v3.0.6 (64-bit)