As we build a model, we do these steps:
STEP 1: Add an Element
STEP 2: Open the Element's dialogbox  see How to open a dialogbox
STEP 3: Edit the Element's Parameters in the dialogbox
This topic reviews how to edit parameters in its dialogbox.
A typical DialogBox and Parameter.
The image below is a typical dialogbox. It is the Edit Dimension dialogbox.
It has one parameter and its databox.

In this image of the Dimension dialogbox, I have added a 'window' to highlight the parameter box.
The three parts to the parameter box are:
300

'Datavalue' in the 'databox'  this is the 'parameter' value that you apply to the element.

10

SpinIncrement value  you can edit this with the arrows at the bottom of the SpinBox tool



SpinBox arrowheads [top and bottom arrowheads to the left and right]


How to edit parameters in a dialogbox.
There are three different methods/procedures you can use to edit a parameters value in a dialogbox:
Method 1: Use your Keyboard

Enter a datavalue directly:
1.  Enter the datavalue with your keyboard 
2.  Press the Enter key on your keyboard to update to the new value 
You must press the 'Enter' key (also called the Return key) to update the value.


Enter a 'symbolic equation':
1.  Enter an equation with your keyboard 
2.  Press the 'Enter' on your keyboard to update the value 
You must press the 'Enter' key (also called the Return key) to update the value.

Symbolic parameters:
•  Simple Arithmetic: +, –, *, /; 
•  Trigonometric [Angles are Radians], pi, Sin(), Cos(), Tan(), Sinh, Cosh, Tansh, ArcSin(), ArcCos(), ArcTan2( ; ) 

Method 2: Use the 'SpinBox' tool

SpinBox arrowhead buttons [in the bluebox]
Top : Left arrowhead to decrease the datavalue by the SpinIncrement
Top : Right arrowhead to increase the datavalue by the SpinIncrement
Bottom : Left arrowhead to divide the SpinIncrement by 10
Bottom : Left arrowhead to multiply the SpinIncrement by 10

Edit the Data Value
•  Click the Top : Left arrowhead to decrease the datavalue. [Datavalue after one click: 67.12345 – SpinIncrement[1] = 66.12345 ] 
•  Click the Top : Right arrowhead to increase the datavalue [Datavalue after one click: 67.12345 + SpinIncrement[1] = 68.12345 ] 
Edit the SpinIncrement
•  Click the Bottom : Left arrowhead to decrease the spinincrement [Datavalue after one click: 1 ÷ 10 = 0.1 ] 
•  Click the Bottom : Right arrowhead to increase the spinincrement [Datavalue after one click: 1 × 10 = 10 ] 
WARNING: The model rebuilds each time you click the top arrow buttons.


< >
'DoubleClick'


Doubleclick inside the databox to hide the SpinBox.
Doubleclick the databox again to show the SpinBox.


Method 3: Use the Zero/Round contextual menu

To use: 'Zero' or 'Round' datavalue:
1.  Rightclick inside the data box 
The 'Zero / Round' contextual menu shows.
•  Zero: value becomes = 0. 
•  Round: value becomes nearest value that is exactly divisible by the SpinIncrement. 
