The user properties dialog has two, three or four tabs.
The number of tabs depends on the type of the user storage system and quota presence. Additional tabs will appear if you have shadow passwords, or any other similar things such as /etc/master.passwd in BSD flavor Unices.
In the 'User Info' tab you can modify: Full name, Login shell (the list of login shells is taken from the /etc/shells file), Home directory, Extra info, User ID, and Password.
The 'Extended Info' tab will appear if you have shadow passwords, or any other similar things such as /etc/master.passwd in BSD flavor Unices. In the 'Extended Info' tab you can modify parameters related to extended account control: Date until change allowed, Date before change required, Date user will be warned about expiration, Date before account inactivation, Date when account expires, and Class (on BSD systems).
You may see the 'Quota' tab only if you have at least one mounted volume with quota enabled and a quota file present. There you may modify all quota related parameters: File Soft Quota, File Hard Quota, File Time Limit (Grace Period), iNode Soft Quota, iNode Hard Quota, iNode Time Limit (Grace Period). All this parameters can be changed for each filesystem that has user quota enabled. Filesystems can be changed using the 'Quota Filesystem' combobox.
The 'Groups' tab contains all the information about user's participation in groups. First of all, it shows the user's primary group. Also, you can assign as many secondary groups as you wish using the arrow buttons.