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Elevations
The Elevation command changes the Elevation of track End-Points. 
An End-Point can have one of several Elevation types: -
None - no elevation defined.
-
Defined - a defined elevation at a specified height.
-
Hidden - a defined elevation but not displayed on the layout.
-
Computed - height is based on height of closest neighbors.
-
Grade - grade is based on height of closed neighbors.
-
Ignored - End-Point is not considered in computations.
-
Station - assigns a name to the End-Point.
Note: Each End-Point can have only one of these attributes.
For example, an End-Point can not be a Defined Elevation and a Station at the same time.
Defined Elevation End-Points are indicated on the layout by Gold colored dots.
Ignored Elevation End-Points are indicated by Blue colored dots.
When an End-Point is selected on the layout by Left-Click, it is highlighted by a large Red dot and its Elevation type and values are displayed in the dialog.
Right-Click splits the track at the specified point to add an Elevation point to the middle of a track.
If possible, the Distance and Height of the nearest Defined Elevation End-Point on each side of the selected End-Point are displayed. If both are displayed then the computed Height and Grade are displayed next to the Computed and Grade Radio Buttons. See below for a discussion on computing elevations.
Defined Elevation End-Points are used to specify fixed heights of track End-Points.
Typically, this would be where grade changes or where clearances must be maintained.
Between Defined Elevation End-Points you can place Computed Elevations and Grade markers.
These values are not entered directly but are based on the Defined Elevations of connected tracks.
This allows you label elevations at intermediate End-Points without having the enter specific values.
Stations are used to provide information for the Profile command.
All Elevation (including Grade and Station) labels are drawn on the layout outlined in boxes. These may be moved by the Move Label command. In addition, Grade labels have an arrow indicating the upwards direction.

The Edit Menu contains commands to Remove or Raise/Lower the Elevations from selected tracks. The entered value is added to all Defined Elevations on Selected tracks. A negative value will lower the Elevations.
Computing Elevations
Elevations for intermediate End-Points can be computed if you have a direct path to Defined Elevation End-Points.
A direct path requires that any connected track has only 2 connections to other tracks. If a Turnout has connections to all 3 End-Points is not possible to choose which path to take.
In the following example, there is a turnout that is connected to three tracks which have Defined Elevations at A, B and C. We want to know the
Computed Elevation at D and the Grade at E. These values cannot be determined because there are two possible paths through the Turnout: from D to E and from D to F.
There are a number of ways to deal with this.
First, we could Define the Elevation at one of the End-Points of the Turnout.
In this example, we have selected F.
This would be the choice if F was a place where the grade changed.
Second, we could disconnect the tracks at F so that there was only one path
through the turnout (from D to E).
Finally, we can Ignore the End-Point at F which logically disconnects the tracks at F. In this example, the Ignored End-Point is marked with a Blue dot.
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