Get a perfect first layer using this file for a 220x220 bed.

Few things to do before starting:

1. Set layer height to 0.2
2. SLOW first layer speed. 10 mm/s works great.
3. Skirt is not required but highly recommended. 3 lines works great. The more the better as it gives you several attempts to level a troubled spot.

Hope this help anyone having trouble and please share picture of that perfect first layer!

NOTE: If you want the curvy skirt I suggest using CURA. PrusaSlicer's skirt setting keeps the lines stright.