Line Drawing

For terminals that have additive attributes the following are used:

Entry Mnemonic
Enable alternate character set enacs
Alternate character set characters acsc
Enter alternate character set smacs
End alternate character set rmacs

For terminals that do not have additive attributes, the following is needed:

Entry Mnemonic
Set attributes sgr

If you do not specify the appropriate alternate character set characters for your terminal, or your terminal does not provide a complete set, normal ASCII characters are substituted for the missing line drawing characters.