This is tricky for me to articulate without getting too wordy!! 
Let me try mapping this concept to Coda’s existing UI:
COLUMN FORMATS & OPTIONS
TEXT
-value for new rows
RICH TEXT
-value for new rows
-row height (slider)
-text overflow treatment (dropdown menu)
—options: wrap to unlimited height, >>wrap to slider row height only<<, overflow, clip, etc.
SELECT LIST
-selectable options (formula)
-allow multiple selections (on/off)
PEOPLE
-allow multiple selections (on/off)
-notify when added (on/off)
-display avatar only (on/off)
value for new rows (on/off)
BUTTON
-label (text/formula)
-action (dropdown menu)
-disable if (formula)
-color (colors)
-icon (icons)
-badge (formula)
CHECKBOX
-value for new rows
IMAGES
-size (dropdown menu)
-shape (dropdown menu)
NUMBER
-decimal places (dropdown menu)
-use 1000 separator (on/off)
-value for new rows
ETC…