Besides doing it on a lease level for each individual lease, you can also renew leases in batches.
Step 1: Click on Tenants and Leases--> Batches--> Lease renewal batches
Step 2: Click on New Lease Renewal Batch
Step 3: Select the dates and then click OK
Step 4: Select all the leases and click OK
Step 5: Click on Property Code B2, which has 2 items(leases)
Step 6: Click on Edit
Step 7: Check mark the "ready for service" box and click save
Step 8: Click on Batch items tab and select all the units
Step 9: Click on Actions--> Create Default Offers (Default offer will be created as per your policy settings)
Step 10: Then finalize your default offers
Now, when the lease reaches its expiry date, it will automatically be renewed.