D+Eb-trill key

Position II/III (L-3f)

D+Eb trill: w ● ● Eb / ○ ○ ○

Position II/III and O/IV with C#-trill displaced/offset (R-2f)

D+Eb trill: w ● ● Eb / ○ ○ ○
D+Eb trill: w ● ● ○ / Eb ○ ○
C+Db trill: w ● ● ● / ○ C# ○

Position 0/IV (R-1f) with C#-trill displaced/offset (R-2f)

D+Eb trill: w ● ● ○ / Eb ○ ○
C+Db trill: w ● ● ● / ○ C# ○

Position IV/V (R-2f) with normal C#-trill (R-1f)

D+Eb trill: w ● ● ○ / ○ Eb ○
C+Db trill: w ● ● ● / C# ○ ○

Position above normal C#-trill (R-1f)

D+Eb trill: w ● ● ○ /Eb  ○ ○
C+Db trill: w ● ● ● / C# ○ ○