The standard grips this chord is usually shown with.
F#sus2 is F#, G# and C#, a suspended second. The shape this page opens on is written 2xx122, lowest string first.

Also written F#2 or F# suspended 2nd. The same chord either way; which spelling you meet depends on who wrote the chart.
There are 9 common shapes for F#sus2 on the guitar, and 46 derived voicings in the triad family.
In which keys. Every note of F#sus2 belongs to C# major (the IV), C# minor (the iv), Eb minor (the ♭III), E major (the ii), F# major (the I), F# minor (the i), Ab minor (the ♭VII), A major (the vi), Bb minor (the ♭VI) and B major (the V).
The common shapes, written lowest string first: 2xx122, 244x24, xx4674, x96679, xx6679, x-9-11-11-9-9, 14-11-11-13-14-x, x-11-11-11-14-14, 14-x-x-13-14-14.
Triad. Three notes across one string set. F#sus2 has xxx122, 444xxx, 4446xx, xx667x, x-x-x-11-9-9, x-x-11-11-9-x, x-9-11-11-9-x, x-11-11-11-9-x.
The common shapes and the derived voicings come from different places, and both are explained in where the chords and the theory come from.
Shows each chord the way this style would voice it, and marks which of its alternatives belong to the idiom.