Style Modifiers:

\n soft break (only valid with \q2, gets replaced with soft space in other wrap modes)
\N hard break
\h hard space

Between {...}:

\b<0/1/weight> bold
\i<0/1> italic
\u<0/1> underline
\s<0/1> strikeout
\bord<width> border
\shad<depth> shadow
\be<0/1> blur edges
\fn<name> font
\fs<size> size
\fsc<x/y><percent> scale
\fsp<pixels> spacing
\fr[<x/y/z>]<degrees> rotation
\fe<charset> character set
\c&H<bbggrr>& primary color
\<1/2/3/4>c&H<bbggrr>& primary/secondary/outline/shadow color
\alpha&H<aa>& primary alpha
\<1/2/3/4>a&H<aa>& primary/secondary/outline/shadow alpha
\a[n]<alignment> ssa alignment type (n - numpad layout)
\k[<f/o>]<duration> karaoke (f - filled from left to right, o - outline highlighting)
\K same as \kf
\q<0-3> wrap style (0,3 - even lines, 1 - endofline, 2 - manual)
\r[<name>] loads default (or <name>) style

\t([<t1>,<t2>,][<accel>,]<style modifiers>) animation, accel: 0->1 slowing, 1->.. accelerating

\move(<x1>,<y1>,<x2>,<y2>[,<t1>,<t2>])
\pos(<x>,<y>)
\org(<x>,<y>) changes the origin of the transformations (scaling, rotation), always use \pos instead of \org to manually position the subs
\fade(<a1>,<a2>,<a3>,<t1>,<t2>,<t3>,<t4>) fadein: t1 -> t2, fadeout: t3 -> t4
\fad(<t1>,<t2>) fadein: start -> start+t1, fadeout: end-t2 -> end
\clip(<x1>,<y1>,<x2>,<y2>) clips drawing outside the given rectangle
\clip([<scale>,]<some drawings>) clips by intersecting with the drawn shape

Drawings:

\p<0/1/..> turns on/off drawing mode (0 - off, 1.. - on)
\pbo<y> baseline offset

Between {\p<1/..>} and {\p0}:

m <x> <y> move to
n <x> <y> move to (doesn't close)
l <x> <y> line to
b <x1> <y1> <x2> <y2> <x3> <y3> bezier to
s <x1> <y1> <x2> <y2> <x3> <y3> .. <xN> <yN> b-spline to (uniform)
p <x> <y> extend b-spline
c close b-spline