As there is no horizontal scrolling in Runn, you'll need to use the right navigation & Period option on the righthand size.
Week (5 days)
Month (5 weeks)
Quarter (3 months)
Half year (6 months)
Year (12 months)
You can toggle weekend - which will how only in Week or Month.
You can also use arrow buttons on your keyboard to move 1 week or 1 month forward or back.