Printed result values can be distractingly big (multiple lines) or, worst go on indefinitely. Some truncation of values is needed.

The truncation used for an explicit request for value (giving a variable name) should be different from that for a report on an activity (e.g., assigning a value).

It is appropriate that these truncation values be set in the same way as other output configuration. So:

    /set truncation <mode> <length> <selector>...

where <selector> is as in /set format.