problem using add field into my attribute table

Question

Hello, I am new using ArcMap, I am trying to add a field into my attribute table, and every time I tried to add field properties it does not allow me to do anything. I do not see the Alias, allow null values or default values, the only thing listed is precision and nothing else. please, could you tell me how to modify this? I am using ArcMap 10.4

RoshellyPaliza-Palacios · Answer

Joe, Thank you! that explains everything! thanks for your time.

JoeBorgione · Answer

To follow up on Dan's comment, be sure you are adding the field to a Feature Class  and not a Shapefile.  See my screen shots below.  The top one is the attribute table of a Shapefile, while the lower one is the attribute table of a Feature Class in a file geodatabse.  They are the exact same data, but in different formats.  Notice in the the Shapefile the unique ID field is called FID, where as the Feature Class calls it OBJECTID.

A Shapefile is actually stored on disc as series of inter-related files:

A file geodatabase is actually a 'special' directory on disc, and all the files that make up a feature class make no sense to us humans:

Boat loads of people use the terms Shapefile and Feature Class interchangeably, which is a pet peeve of mine....

RoshellyPaliza-Palacios · Answer

Thanks for replying Dan.

I am taking this online class, and I am supposed to see this:

As you see under field properties there are three options listed, as in my case I only see one (precision), what I am trying to find is how to modify this, for me to see the same options.

Thank you