You can locate the different account types by scrolling through the Market Watch pairs/instruments. If you can't see them/any, right-click on a pair/instrument and click on the Show All option.
$7 Commission, majors pairs have a medium spread.
Pro Pairs (.pro)
$8 Commission, majors pairs have a smaller spread.
VIP Pairs (.xtr)
$12 Commission, major pairs have even a smaller spread than Pro Pairs, 25k minimum deposit.
Var Pairs (.var)
$0 Commission, major pairs have a higher spread.
Mini Pairs (.mini)
$1 Commission, smaller lot sizes (1 lot = 1000).
Mini Pairs (.Mini)
$7 Commission, this is only valid for Indices.
Big Pairs (.big)
$10 Commission, larger contract sizes, depending on the pair selected.
*The above commission stated for Pro pairs is excluding XAUUSD.pro which holds a commission fee of $10, as it falls under the Metals category. Different account types are only available for Forex and certain other symbols.