Read and Watch Part 1 Here...
This has set the target length to 50mm, however we may also
need a minimum length set. This video shows a rule being created that also
includes a minimum length, in this case a minimum length of 40mm and a maximum
length of 50mm, on the same net. The yellow background to the column cells on
the PCB Panel, indicates a rule to be met, where a red background indicates a
broken rule. The route can be adjusted to ensure the length rule is met.