Slides from grace notes to chords

[Carlos Martinez]

Hello, 

Got a question:

I am doing a slide /glissando from a hidden grace note into a two note chord ..
What is the norm? Does the glissando needs to show sliding to both notes or one 
will suffice?


Example:   \grace { \hideNotes d,8 \glissando  }\unHideNotes <a' e'>2.  \grace 
{ \hideNotes d,8 \glissando  }\unHideNotes<a' e'>2. %m1

If the slide needs to show on both notes, how do I accomplish that?

Thanks!