Every fingering that fits a hand
3211
moderate
321x
easy
3565
hard
xaa8
easy
What is true of it
B♭ is B♭, D and F — 1, 3 and 5 counted from B♭.
On an instrument that cannot reach all 3, the 5 goes first, in that order.
The easiest of the 4 fingerings below is 3211: 4 fingers, held at the 1st fret.
None of them uses an open string, so this chord moves up the neck unchanged — the same shape 1 fret higher is the chord a semitone above.
Where its notes are on the neck
The brass dots are B♭, the root. Everything else is a chord tone with its degree printed in it.
With a different note underneath
B♭/D
x211
B♭/F
aaax
An inversion is the same chord with a different note lowest. The name changes to a slash name because the bass is what a listener hears as the foundation.