The size of the depiction is determined by additional material that you add to the List declaration.
Fixed
The keyword fixed can be used to specify that the depictions are of fixed size (and you can specify that size). For example:
List "Analytic Traffic Light" fixed 200 { ... }
Percent of Symbol
The key clause percent of symbol can be used to specify that the depiction is a percentage of the symbol’s size, and you must then specify that percentage. For example:
List "Analytic Thermometer" percent of symbol 50 {... }
For node symbols
If fixed is specified, the size given is taken to be in units of 100ths of an inch, and:
▪if the depiction is a left or right depiction, the size given is taken to be the height and the width is adjusted to preserve the aspect ratio of the depiction
▪if the depiction is a top or bottom depiction, the size given is taken to be the width and the height is adjusted to preserve the aspect ratio of the depiction
If a percentage of the symbol’s size is specified (percent of symbol key clause):
▪if the depiction is a left or right depiction, the size is taken to be the height expressed as a percentage of the symbol’s height and the width is adjusted to preserve the aspect ratio of the depiction
▪if the depiction is a top or bottom depiction, the size is taken to be the width expressed as a percentage of the symbol’s width and the height is adjusted to preserve the aspect ratio of the depiction
For line symbols
If fixed is specified, the size given is taken to be in units of 100ths of an inch, and:
▪if the depiction is a left or right depiction, the size given is taken to be the height and the width is adjusted to preserve the aspect ratio of the depiction
▪if the depiction is a top or bottom depiction, the size given is taken to be the width and the height is adjusted to preserve the aspect ratio of the depiction
If a percentage of the symbol’s size is specified (percent of symbol key clause):
▪the size specified is treated as though it were fixed since there is no symbol size of which to take a percentage
If the user specifies nothing, it is treated as though the user had specified 100% of the symbol’s size.