21 Modify UserIn User Manage interface, click on , system pops up Modify User interface. CheckChange Password, and change password and remark, see Figure 4- 8.Figure 4- 8 Delete UserIn User Manage interface, click on to delete user.4.2 Info Search4.2.1 Call HistoryHere you can view call history of VTO in Call History interface. It can save up to 1024items. .Figure 4- 9