Check that the results described at Font Features for Scheherazade appear here.
Feature nameFeature idFeature setting Example
Dalcv12 0-Standard ࢮݚݙۮڐڏڎڍڌڋڊډڈذ د
    1=Alternate ݙۮڐڏڎࢮݚڍڌڋڊډڈذ د
Meem cv44 0=Standard م ممم ݥ ݥݥݥ ݦ ݦݦݦ ࢧ ࢧࢧࢧ
    1=Sindhi-style م ممم ݥ ݥݥݥ ݦ ݦݦݦ ࢧ ࢧࢧࢧ
Heh cv44 0=Standard ه ههه
    1=Sindhi-style ه ههه
    2=Urdu-style ه ههه
    3=Kurdish-style ه ههه
Arabic U cv50 0=Standard ۇ ۇٴ
    1=Filled ۇ ۇٴ
Maddah cv60 0=Small ◌ٓ آ آ
    1=Large ◌ٓ آ آ
Shadda+kasra placement cv62 0=Raised ◌ٍّ بٍّ ◌ِّ بِّ
    1=Lowered ◌ٍّ بٍّ ◌ِّ بِّ
Damma cv70 0=Standard ◌ُ بُ
    1=Filled ◌ُ بُ
    2=Short ◌ُ بُ
Dammatan cv72 0=Standard ◌ٌ بٌ
    1=Six-nine ◌ٌ بٌ
Inverted damma cv74 0=Standard ◌ٗ بٗ
    1=Hollow ◌ٗ بٗ
Superscript alef cv76 0=Small ݷٰ ݷٰݷٰݷٰ ۑٰ ۑٰۑٰۑٰ ېٰ ېٰېٰېٰ يٴٰ يٴٰيٴٰي ٴٰ يٰ يٰيٰيٰ ىٰ ىٰىٰىٰ ئٰ ئٰئٰئٰ ێٰ ێٰێٰێٰ یٰ یٰیٰیٰ ؿٰ ؿٰؿٰؿٰ ؾٰ ؾٰؾٰؾٰ ؽٰ ؽٰؽٰؽٰ ࢩٰ ࢩٰࢩٰࢩٰ ࢨٰ ࢨٰࢨٰࢨٰ ڝٰ ڝٰڝٰڝٰ ضٰ ضٰضٰضٰ صٰ صٰصٰصٰ ݶٰ ݶٰݶٰݶٰ ݵٰ ݵٰݵٰݵٰ
    1=Large ݷٰ ݷٰݷٰݷٰ ۑٰ ۑٰۑٰۑٰ ېٰ ېٰېٰېٰ يٴٰ يٴٰيٴٰي ٴٰ يٰ يٰيٰيٰ ىٰ ىٰىٰىٰ ئٰ ئٰئٰئٰ ێٰ ێٰێٰێٰ یٰ یٰیٰیٰ ؿٰ ؿٰؿٰؿٰ ؾٰ ؾٰؾٰؾٰ ؽٰ ؽٰؽٰؽٰ ࢩٰ ࢩٰࢩٰࢩٰ ࢨٰ ࢨٰࢨٰࢨٰ ڝٰ ڝٰڝٰڝٰ ضٰ ضٰضٰضٰ صٰ صٰصٰصٰ ݶٰ ݶٰݶٰݶٰ ݵٰ ݵٰݵٰݵٰ
Sukun cv78 0=Closed ◌ْ بْ
    1=Open down ◌ْ بْ
    2=Open left ◌ْ بْ
End of ayah cv80 0=Standard ۝123
    1=Simplified A ۝123
    2=Simplified B ۝123
Eastern digits cv82 0=Standard ۴۵۶۷
    1=Sindhi-style ۴۵۶۷
    2=Urdu-style ۴۵۶۷
    4=Rohingya-style ۴۵۶۷
Comma cv84 0=Upward ؛ ،
    1=Downward ؛ ،
Jeh hack cv90 0=Standard ژ
    1=Dot Hat ژ
  code point U+08B2 ARABIC LETTER ZAIN WITH INVERTED V ABOVE ࢲ مࢲ
Dotless head of khah hack cv92 0=Standard ◌ۡ بۡ
    1=Jazm ◌ۡ بۡ
Show invisible characters invs 0=False ‍ ‌ ⁧ ⁦ ⁨ ⁩ ‫ ‪ ‬ ‏ ‎ ͏ ؜
    1=True ‍ ‌ ⁧ ⁦ ⁨ ⁩ ‫ ‪ ‬ ‏ ‎ ͏ ؜