“mdo” defines (or redefines) the command-line operations associated with a particular movie frame. These “generalized movie commands” will be executed every time the numbered frame is played.

mdo frame: command

// Creates a single frame movie involving a rotation about X and Y 

load test.pdb 
mset 1 
mdo 1, turn x,5; turn y,5; 
mplay 

These commands are usually created by a PyMOL utility program (such as util.mrock). Command can actually contain several commands separated by semicolons ';'

The “mset” command must first be used to define the movie before “mdo” statements will have any effect. Redefinition of the movie clears any existing mdo statements.

mset | mplay | mstop | cmd.mdo | commands