Piega Thermo Check for Windows 1.6 - Manual (Page 32)

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Command Summary
[Left-mouseclick] Selects a user.
[Ctrl-U] Adds a new user.
[Insert] If there is no selection, or a user is selected, a new user will be added.
[Delete] If a user is currently selected, then this selected user will be deleted.
[F2] Allows the name of a selected user to be changed.
[Esc] When editing a user name, restores the original name. If the user has just been
added, deletes the item.