Tool trajectory parameters for a certain procedure are as shown below.
The 
symbol
indicates that the parameters were defined using relations.
Holding the cursor over the parameter values, a tooltip is displayed containing the equation for the relation.
Examples
For Horiz. Step, the relation is 0.05*tldi (tldi is the parameter Short Name for tool diameter). In this case, the tool diameter is 10mm, hence the Horiz. Step value of 0.5000.
In this case, Vertical Step has the same relation and has the same parameter value.
Vertical Step = 0.5 * tldi = 0.5000.
Z-Top has a parameter relation of clear-2. (clear is the parameter Short Name for Clearance Plane). This means that the Clearance Plane value is 200. Parameter table example.
Z-Bottom
has a parameter relation that is the same as the parameter value. This
is because no relation is specified for this parameter even though a relation
can be used. This is indicated by the 
symbol.
To change a relation:
Click on the parameter value. The equation will be displayed.
In this case, the Horiz. Step relation is changed to 0.045*tldi.
Press Enter to display the new parameter value.
Changing the value of a parameter that is used in a relation equation, will result in updated values for all parameters that use the changed parameter as part of a relation.
For example, in this case, if the tool diameter is changed from 10 to 5, this will affect the Horiz. Step and Vertical Step and any other parameter that uses tldi as part of its relation. In the example below, the Horiz. Step and Vertical Step parameters have been updated (the Horiz. Step has a different value as its relation was previously changed to 0.045*tldi.
