The Rules added and edited by the Session Editor control:-

• behaviour of drivers (and their trains)
• weather conditions
• time of day
• signals and switches
• display of information and instructions to the player
• train timetables
• responses to events (time, triggers, load levels, other trains, etc)
• decisions on what happens next

to name just a few.

Notes: the Name of the Session is the Username tag entry in the config.txt file the Session Description of the Session is the Description tag entry in the config.txt file Both entries can be edited in the Session Editor and the config.txt file for the Session asset will be updated when you save the Session and exit Surveyor.

The order of the Rules in the Editor list is usually not important. All the rules shown will be executed simultaneously although some rules will take longer to complete than others

If the order in which some of the Rules are executed is important, then group them together in a Ordered List Rule (examples are shown in the image) in the order you want them to be executed. Information on using Ordered Lists can be found at Using Ordered Lists

Rules can be grouped together for convenience (e.g. all the Rules that set signals at the start of the Session) or because they depend on a particular event (e.g. a time, a train arriving at a set point, a wagon being loaded, etc). These form Nested Rules and are indicated by arrow heads as shown in the image. Click on an arrow head to open up its nested list of child Rules.



Each of the Rules that have been nested under the Ordered List Rule in the image above have been indented one level to the right.

More information on the various types of List Rules and how to create Nested Rules can be found on the Trainz Wiki Page at:-

• How to Use Parent and Child Rules
  

• the  Add  button will insert a new Rule below the selected (highlighted) Rule or at the end of the list if no Rule has been selected

To use the other buttons, select a Rule first by clicking on it

• the  Edit  button will open the selected (highlighted) Rule for editing
• the  Delete  button will delete the selected Rule
• the  Indent/Outdent  buttons will move the selected Rule right or left
• the  Up/Down  buttons will move the selected Rule Up or Down

•  Edit rule  is the same as the  Edit  button
•  Insert above  is the same as the  Add  button but inserts the new Rule above the selected Rule
•  Insert below  is the same as the  Add  button (inserts the new rule below the selected Rule)
•  Cut  Copy  Paste  will move/copy the rule (and its nested child rules if it has any) between the Session Editor and the Clipboard
•  Delete  is the same as the  Delete  button
•  Indent  is the same as the  Indent  button
•  Outdent  is the same as the  Outdent  button
•  Move up  is the same as the  Up  button
•  Move down  is the same as the  Down  button

Warning:
	The  Cut  and  Copy  operations will NOT copy ALL the settings in some rules, for example the Navigation Display Rule. It is a good idea to check the settings of each rule that you paste into the Session Editor

• How to Use Parent and Child Rules

More Tutorials and Guides to Using Trainz

• How to Guides
• Driver Commands List
• Session Rules List (Alphabetical) with Parameters
• Session Rules List (Categories) With Parameters