You need to set toExtendedFocusto TreeOptions.SelectionOptionsto focus the column, and then go into edit mode with F2 or click the selected cell again.
If you want to navigate using the keyboard, you also need to set toGridExtensionsto TreeOptions.MiscOptions.
, OnEditing Allowed False , .
coAllowFocus Options , (, , ).
P.S. coEditable TVTColumnOption VTV.