To present a subset of trials that are randomized with the wgr field, insert a row into the block of these trials after the last row of the number of them you want presented. If you have 8 trials but only want 4 presented, simply put a trial after the fourth row of all the rows that have the same nonzero positive integer in the wgr field. Take a look at the attached file for an example.
Note how the trial 6 uses a value of 0 in its wgr field to ensure that only four trials with with the value of 1 in the wgr field will be presented. DirectRT will still select from all of the trials with a value of 1 in the wgr field, but only present four of them in this example.
Trial 6 also skips over the rest of the trials by using the skip command to jump to trial 11. You can use this feature to jump to anywhere you want in your .csv input file.
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