Hello @Daved1 ,
Default form when you're adding record in Dataverse would be "MainForm" , In This tab you have your default main form:

In there you can edit the field you're adding,
If you want to have another form and change it to the defualt it's possible in the "Old" layout ,
1)Click on the cog Icon on your main make.powerapps.com page
2) Click on "Advanced Settings"
3) Click on the Down Arrow button near setting and go to system customizations

4) Go to the default solution (or yours if you have any), Find your Entity and in the forms tab check "Form Order" and click on "Main form Set" then you can reorder them with a buttton, youre done 🙂

If you want to see the whole process from setting new Column to view it in View mode and Add it to the default form go here:
https://youtu.be/W9uIWIc_Vl4
Hope that helped,
BR
Zbigniew