# Master Mapping
We'll start by creating a master form first where we would map the values.
In the basic details under ***'**Apply master data settings',* turn on *'Use form submissions as master data for other forms'.*
The master form would have 3 select type fields **Purchase Type, Item Name** & **Item Price.**
Purchase Type
Gadgets, Stationery, Pantry
Price
Gadgets
Mouse, Keyboard, Monitor
450, 650, 1200
Stationery
Pen, A4 Sheets
200, 450
Pantry
Coffee, Muffins
200, 300
**Onc**e the options have been added go to **Settings > Conditions > Conditional value of fields** and map the data as per the table above.
Now we'll make the child form with similar fields.
Create another form with the select fields **Purchase Type, Item Name & Item Price** and a text field **Employee Name.**
Once we've made the form we'll pick master for the fields separately.
* Click the **settings** icon next to the select fields and open **Master data settings**.
* **Toggle on** *'I want to pick master for this field separately'.*
* Select the master form we made previously.
* ***'Select the master field from which value should be populate'***
Similarly select master for the remaining two fields **Item Name** & **Item Price**.
Last step of the process would be adding conditional settings in this form.
Just like the master form, we'll map **Purchase Type** with **Item Name** and **Item Name** with **Item Price**.
Here's how it would look like to the end user.
As per the data in the master form, options would populate the select fields.
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