It doesn't have to, but again, if what you have in mind is to correct for some of the under-representation that currently exists in Canada, but playing with district magnitude and recognizing the fact that some areas, some groups, may be under-represented, district magnitude can address that. But changing district magnitude doesn't mean changing the number of seats in the House. What it means is how many winners, how many representatives, you have from the various districts. District boundaries would have to be redrawn then.
On September 23rd, 2016. See this statement in context.