Placeholder Text Feature for InDesign

Perhaps there is a feature and I just haven't come across it. 

Seeing as InDesign has interactive PDFs in mind giving us the ability to create forms easily and then export them as a PDF to open in Acrobat, I feel like a feature to inset placeholder text to fields shouldn't be too difficult to implement.

To clarify, I was hoping to find an option under the Buttons and Forms toolbox that allows us to check off a box for placeholder text so when someone types in the field the original text there is overwritten with the new content. Like a "W" for width and an "L" for length in field boxes meant to hold dimensions for rooms. 

I could see it being part of the Buttons and Forms toolbox where you select an option that says "Placeholder Text" and offers you a field to write in what that text is going to be. Then you can simply duplicate that Text Field for as many times as needed. 

Right now the option I'm using is just creating all the field normally and after exporting them into PDF, I then have to go through each field individually and manually add the placeholder text, then save it. This takes a lot of time out of my day to do because there are a lot of these fields I have to do this too.

[Moved from Community Help (which is about the forums) to a better forum... Mod]
[To find a forum for your program please start at https://community.adobe.com/]