I cannot figure out how to transpose a score from D sharp minor to E flat minor (enharmonic). I tried to read what i can find online, but did not succeed - I also tried the notations menu - transposition - ticking on/off in the “prefer enharmonic equivalent keys…” box.
I can do this in two steps after I select the area to be transposed.
Use the SHIFT+K popover to change the Key Signature by entering eb (lower case).
With your selection still active, use Write > Transpose to set the transposition to a diminished second up.
(Why the change key signature tick-box, which would allow me to change everything, is grayed out in the Transpose panel, I cannot deduce. Sometimes that tick-box is available and sometimes not.)
Select the notes in the score including the key signature and invoke the transpose dialog found under the ‘write’ menu. Use the ‘Calculate interval’ function: