Please describe this in more detail.
Upon entering new cells into a large existing file,
Exactly how did you add these? Are they new fields defined in a table, new fields added to a layout? Done via Manage | Database | Fields or from a list view layout?...
for som reason the cell description does not showup
What description is this? The field name shown in Manage | database | fields or something else?
Further selecting the Auto Enter Section, the entered data doesn't showup
Auto enter is a field option that controls what data gets automatically entered into a field the next time a record is created or the next time a field referenced in the auto-enter calculation is modified if the "Do not replace existing value..." option is not selected.
Thus, existing records will not automatically update to display different values if you add or change an auto-enter calculation. You have to take additional steps to update those fields. A Calculation field, on the other hand, will update immediately.
Here's a link that describes one method to force existing records to update when you change an auto-enter calculation: Updating values in auto-enter calc fields without using Replace Field Contents