set-display-table-slot

set-display-table-slot is an autoloaded compiled Lisp function in `disp-table.el'.

(set-display-table-slot DISPLAY-TABLE SLOT VALUE)

Set the value of the extra slot in DISPLAY-TABLE named SLOT to VALUE.
SLOT may be a number from 0 to 5 inclusive, or a name (symbol).
Valid symbols are `truncation', `wrap', `escape', `control',
`selective-display', and `vertical-border'.