[gmx-users] how to extract frames

[Tanos França]

    Hi folks,
    I can not remember how to procedure to extract frames from the .trr 
file after the dynamics simulation. I have performed a MD simulation of 
1 ns with a step 0,5 fs and I would like to know how to extract frames 
in .pdb files at each 10 ps. Could someone help me with this matter ?
    Best regards
    Tanos França.