First you must have Cadence setuped on you computer.6 r% |) c5 ~( N
The DSN, and brd files can be imported into Altium. 7 T0 v) A. |& q$ ]: G8 F# U1 l. g2 Z
then you can edit your design in Altium.% Z; U" r: q2 p1 y' z
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If you mean How to use Altium Designer, You can find a lot of technique article in http://wiki.altium.com/display/PUB/Altium+Wiki3 R6 ]# P8 d) l" P