A variable is a real numerical value lying between a mini and a maxi value ad defined with an step value.
The value returned in a calculus is named current value.
A variable is created through menu Calculus - New variable (keyboard shortcut Ctrl + V).
A variable can modified through icon .
In the dialog box opened when creating a variable you can associate to the variable a special display in tle lower right side of tje figure as follows :
When clicking on the + button, the variable will be incremented by the step value.
When clicking on the - button, the variable will be decremented by the step value.
Clicking on the = button opens a dialog box allowing the user to modify the variable.
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A variable ca be used to generate a linked point locus, a dotted point locus or an object locus.
A variable can also been used to create a macro :