In my application you can map certain fields by drag and drop. As soon as they are mapped I want them to be clickable to show textboxes into which the user can write additional information for the mapped field.
Where would be the correct place to make that textboxes appear? I'm using windows forms. I would prefer to not waste space for this, so I'd prefer a popup or something like this. Currently my form consists of two columns (one to drag the element from and one with rows to drop them on) which completely fill out the form.
Are there other options than making my form larger or putting the information into a popup? If not, should i use an 'inline popup' or a separate form?