What is New in PTC Mathcad Prime 7.0.0.0 > Combo-box Input Control
  
Combo-box Input Control
Control calculations in your worksheet with easy to create, easy to use drop-down menus of variable definitions.
User Interface Location: Click Input/Output > Controls.
Release: PTC Mathcad Prime 7.0.0.0
Benefits and Description
Calculations are driven by variables, and for some engineering problems, you may need several different variable values to provide a complete picture of the engineering topic you are documenting. Use Combo-box Input Controls to pre-define variables and variable values associated with different calculation options. You can change sets of variables related to specific use cases by selecting a new option in the combo-box drop down menu.
For example, if your worksheet calculations change depending on what metal is used, with different metals having different characteristics, you can set up a combo-box to define all the variables and variable values associated with different types of metal. You can then select the metal types in the combo-box and the worksheet is recalculated using the characteristics of the selected metal.
You can define multiple variables for each combo-box selection. You can use multiple combo-boxes in your worksheet, and you can include them almost anywhere in an equation. To enable easier conversion from legacy Mathcad worksheets, legacy web controls are converted to the combo-box in PTC Mathcad Prime 7.0.0.0.