Nope.

When you set up your radio, it has Endpoint Adjustment, Trim, and Sub Trim.

Endpoint: This is the internal stop of the servo so it isn't fighting against the suspension limits of your car. You generally set this just short of the maximum steering angle allowed by your geometry, you really don't want the servo straining against the bump-stop

Trim: This moves the neutral point around inside of the set endpoint adjustment, but it will still go to both endpoints at full lock and 100% dual rate or steering throw setting.

Sub Trim: This moves the neutral point AND THE ENDPOINTS WITH THE NEUTRAL POINT. Using sub-trim to trim the car will change the steering throw left and right. It is necessary in some classes to use Sub Trim such as 1/12 scale, where the servo is exactly centered in the car and you want to use the exact same servo throw in both directions so you can have equal steering Ackermann on both sides, but is less useful in touring car or offroad where the steering throw endpoints may be different.