To specify additional settings for orders (separately for forex, stocks, options and futures), go to the Order defaults by type tab.

The Use specify quantity increment checkbox refers to the Quantity increment (lots) field only. When Use specify quantity increment is checked, the value of the Quantity increment field is applied to all quantity counters, otherwise the minimal lot is the quantity value for all quantity counters. 

Default quantity (lots) specifies the quantity of the default value of quantity fields.

If a value has been specified in the Warn if quantity exceeds (lots) field, then the system displays a warning message.

The Trailing stop offset prefill field specifies the default value for the Trailing Stop (e.g. the Tr. Stop field in the Order Entry panel).

You can also specify the price increment (e.g. the Limit Price field in the Order Entry panel). Price increment (Arrow) (pips) specifies the increment value on pressing the Up Arrow (↑) key. Price increment (ctrl+arrow) (pips) specifies the increment value on pressing the Ctrl and Up Arrow keys together (<CTRL> + <↑>). Price increment (alt+arrow) (pips) specifies the increment value on pressing the Alt and Up Arrow Up keys together (<ALT> + <↑>).