How can I conditionally disable a field?

I have a question regarding this below. The form the customer gets to sign will allow them to edit. Is there a way for me to lock certain fields so they can’t edit them? Thank you!

Hello Jennifer - You mentioned "I have a question regarding this below" so I'm assuming you attached a screenshot to your email reply. If you did, we won't see it here in our forum.

Related guide: How-to-Post-Screenshots-to-Our-Support-Forum

Is there a way for me to lock certain fields so they can’t edit them?

There is a way to lock (or as we call it, disable) certain fields conditionally. Please follow the instructions laid out on the guide I sent earlier on how to disable a field conditionally.

Complete guide: How-to-Enable-Disable-Fields-Using-Conditional-Logic

Give that a spin and let us know if you'd need more help.

Oh yes - thanks.  I read in another post that there is no way to hide the products that the customer doesn't purchase on the form.  Is that still correct or is there a way to do that now? 

Here is a screen shot.  When the customer gets the form to sign, I'd like all other products to be hidden.  I believe this is a Purchase Order widget I'm using.  

Unfortunately, it is not possible to hide all the other options inside the payment field. However, it is possible to hide the whole payment field when an option is selected. You can use the Show and Hide field condition for that. Here's an example:

You may pass the value selected in the payment field into another field. Please take note that only the price will be pass and not the description. You can use the Update/Calculate Field condition for that.

You can also create these products outside the payment field. For the total amount, please use the Form Calculation widget. After that, you can pass the value of the Form Calculation widget into the payment field.

Please check these guides:
How-to-Perform-Form-Calculation-Using-a-Widget
How-to-Assign-Calculation-Value
How-to-Pass-a-Calculation-to-a-Payment-Field

Hope that helps. If you have any questions, let us know. Thank you.