In this tutorial,i’ll show you How to change font size in DataGridView.Solution 1: Design-timeIn winform datagrid, right click to view its properties. It has a property called DefaultCellStyle. Click the ellipsis on DefaultCellStyle, then it will present Cell Style Builder window which has the option to change the font size.Solution 2: Run-timethis.dgvCustomers.DefaultCellStyle.Font = new Font("Tahoma", 12);