# Application-editable only

> [HTML Version](application-editableonly.htm)

_cformat_ code:  **U**

This designation may be added to an editable text column (type **E**, [Column contains editable text](columncontainseditable.md)) to cause the column to only be updatable by the application. In other words, this will make the column editable but not-editable. Possible reasons for using this format type include:

•	You want to update the field when re-entering the tree with XTROP\_REPLACE. (Only cells associated with the answer array are updated when re-entering with XTROP\_REPLACE, and only editable cells are in the answer array.) The alternative would be to use XTROP\_REPLACE when re-entering the tree, in which case all of the data cells can be updated, but the operation is less efficient.

•	You want to use the same variable for both the answer and data arrays. This requires that all fields be "editable".

**History**

2012 April, A-Shell 6.0.1247:  Adding _cformat_ code **U** (application-editable only) to a checkbox (**T** or **t**) or radio button (**R** or **r**) now has the expected effect, i.e. the same effect as on regular text cells. That is, the checkbox/radio button becomes disabled to the user, but gets updated by the answer array.