You can control how each sponsor logo is displayed by setting the sponsor's logo shape. This is useful when your event uses a mix of wide horizontal logos and square logos, because square logos often need less padding to look balanced in sponsor grids.
To adjust this, go to Content > Sponsors, open the sponsor you want to edit, and choose the Media tab.
Use the Logo Shape field to choose Default (Wide) or Square. Choose Square when the sponsor logo is closer to a square than a wide rectangle. HeySummit then uses tighter logo padding in sponsor lists and main sponsor sections so the logo has more visual weight.
The overall sponsor logo size is still controlled by your event theme settings, so use the theme logo size controls if all sponsor logos need to appear larger or smaller.