The information in this Wiki Page applies to both TANE and TRS19.

What is the Session Editor

	The Session Editor allows you to add, delete and edit the Rules in a Session
	The Rules control the operation of the Session

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
decisions on what has to happen next

to name just a few.

In TANE and TRS19 the Session Editor is found in the Surveyor Main Menu. In TRS19 SP1 it has been moved to the Surveyor Edit Menu. In either case select Edit Session from the menu.

When loaded, the Session Editor will show all the Rules that have been added to the Session. If you have just opened the Editor on a Route without a Session then it will show a very basic set of Rules. The Editor will allow you to add additional Rules, and delete or edit those shown. Links to extensive lists of Rules can be found at the end of this document.

Notes:

the Name of the Session is the Username tag entry in the config.txt file
the 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 generally 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 (some are shown in the image)

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 have been indented one level to the right.