Shading and stacking

-#- ... -#- shades a text: -#-A1-A2-#- writes

.

You can shade a part of a group with #//, #h/, #v/, and #/ : A1#// is

; A1#h/ is

; A1#v/ is

, and A1#/ is

.

# alone allows to stack signs: m#a is

.