The Turnout Designer uses a number of different dialogs (one for each type of turnout or sectional track).
This dialog is for a Regular turnout.
The Rail height (Code) can be added to the Manufacturer (eg. Peco-55) or the Description (eg. Medium Right, Code 55).
The Scale is the current scale from the Scale Drop Down List on the Layout dialog.
Manufacturer, Description and Part Number (#) comprise the Title of the turnout. These values are used in the Turnout Selection dialog and the parts list. For regular and curved turnouts there are Descriptions and Part Numbers for the Right and Left hand turnouts.
The Print button prints a full size diagram of the turnout. You can use this to check your dimensions and make any required changes. You should expect to make several printouts as you refine your dimensions.
The Ok button completes the design. The new turnout is added to the list in the Turnout Selection dialog. The turnout data is saved in the xtrkcad.cus file for the next time you use XTrkCad. Please consider contributing this information for others to use. You can change the Parameters or Title of existing designs by using the Custom Management dialog.
The Cancel button removes the Turnout Designer dialog.
It is best to start by marking the End-Points of the turnout on a piece of paper. Extend the curved leg of the turnout (try attaching a straight sectional track) and measure the angle. Frog numbers are easiest to calculate.
Enter your data and press Print, if you have an accurate printer. Check the dimensions of the turnout against the printout and make adjustments as necessary. Concentrate on the lengths and offsets first, then adjust the angles.
The resulting turnout is an approximation. In particular the curves will not be correct, but this is not important for placing turnouts.
You can use the Group command to add cosmetic details to the Turnout definitions.