Go to GS Logo > Logo Shortcode & click Create New Shortcode or edit existing one. Then click on 2nd tab Style Settings
Select Logos style from Default / Grayscale / Gray to Default / Default to Gray
Logo Margin, Number of Logos on Desktop, Tablet & Mobile
Filter Text, Alignment, Clickable Logos to New Tab / New Window.
Based on your selection at left side, preview will display at right area.
** Different number of setting options will available upon theme selection.