You can customize the Header Logo as you like. Follow Theme Options > Theme Settings. Here from the Header tab click Header Logo, and the header logo field will appear.
Custom Header Logo Style: Switch on for the custom header logo style.
Logo Dimensions (Width/Height): Set logo dimensions width, height, and unit.
Logo Top and Bottom Margin: Set logo top and bottom margin.
Sticky Logo Dimensions (Width/Height): Set Sticky logo dimensions width, height, and unit.
Sticky Logo Top and Bottom Margin: Set the Sticky logo top and bottom margin.
Click Save Changes to save theme options. Click Reset Section to reset only this section. Click Reset All to reset all theme options.